| ||||
|---|---|---|---|---|
| Cardinal | fifty-two | |||
| Ordinal | 52nd (fifty-second) | |||
| Factorization | 22 × 13 | |||
| Divisors | 1, 2, 4, 13, 26, 52 | |||
| Greek numeral | ΝΒ´ | |||
| Roman numeral | LII | |||
| Binary | 1101002 | |||
| Ternary | 12213 | |||
| Senary | 1246 | |||
| Octal | 648 | |||
| Duodecimal | 4412 | |||
| Hexadecimal | 3416 | |||
52 (fifty-two) is the natural number following 51 and preceding 53.
In mathematics
[edit]Fifty-two is
- a composite number; a square-prime, of the form (p2, q) where q is a higher prime. It is the sixth of this form and the fifth of the form (22.q).
- the 5th Bell number,[1] the number of ways to partition a set of 5 objects.
- a decagonal number.[2]
- with an aliquot sum of 46; within an aliquot sequence of seven composite numbers (52,46,26,16,15, 9,4,3,1,0) to the prime in the 3-aliquot tree. This sequence does not extend above 52 because it is,
- an untouchable number, since it is never the sum of proper divisors of any number,[3] and it is a noncototient since it is not equal to x − φ(x) for any x.[4]
- a vertically symmetrical number.[5]
In science
[edit]- The atomic number of tellurium
Astronomy
[edit]- Messier object M52, a magnitude 8.0 open cluster in the constellation Cassiopeia, also known as NGC 7654.
- The New General Catalogue object NGC 52, a spiral galaxy in the constellation Pegasus.
In other fields
[edit]
Fifty-two is:
- The approximate number of weeks in a year. 52 weeks is 364 days, while the tropical year is 365.24 days long. According to ISO 8601, most years have 52 weeks while some have 53.
- A significant number in the Maya calendar
- On the modern piano, the number of white keys (notes in the C major scale)
- The number of cards in a standard deck of playing cards, not counting Jokers or advertisement cards
- The name of a practical joke card game 52 Pickup
- 52 Pick-Up is a film starring Roy Scheider and Ann Margaret
- The code for international direct dial phone calls to Mexico
- A weekly comic series from DC Comics entitled 52 has 52 issues, with a plot spanning one full year.
- The New 52 is a 2011 revamp and relaunch by DC Comics of its entire line of ongoing monthly superhero books.
- The number of letters in the English alphabet, if majuscules are distinguished from minuscules
- The number of the French department Haute-Marne
- 52nd Street (disambiguation)
- 52 Hand Blocks, a variant of the martial art jailhouse rock.
- 52 is the car number of retired NASCAR driver Jimmy Means
- 52 American hostages were held in the Iran hostage crisis
- The number of the laps of the British Grand Prix since 2010.
Historical years
[edit]See also
[edit]References
[edit]- ^ "Sloane's A000110 : Bell or exponential numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
- ^ "Sloane's A001107 : 10-gonal (or decagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
- ^ "Sloane's A005114 : Untouchable numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
- ^ "Sloane's A005278 : Noncototients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
- ^ "Sloane's A053701 : Vertically symmetric numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-05-08.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction