| ||||
---|---|---|---|---|
Cardinal | one hundred fifty-five | |||
Ordinal | 155th (one hundred fifty-fifth) | |||
Factorization | 5 × 31 | |||
Divisors | 1, 5, 31, 155 | |||
Greek numeral | ΡΝΕ´ | |||
Roman numeral | CLV | |||
Binary | 100110112 | |||
Ternary | 122023 | |||
Senary | 4156 | |||
Octal | 2338 | |||
Duodecimal | 10B12 | |||
Hexadecimal | 9B16 |
155 (one hundred [and] fifty-five) is the natural number following 154 and preceding 156.
In mathematics
[edit]155 is:
- a composite number
- a semiprime.
- a deficient number, since 1+5+31=37<155.
- odious, since its binary expansion has a total of 5 ones in it.
There are 155 primitive permutation groups of degree 81. OEIS: A000019
If one adds up all the primes from the least through the greatest prime factors of 155, that is, 5 and 31, the result is 155. (sequence A055233 in the OEIS) Only three other "small" semiprimes (10, 39, and 371) share this attribute.
In the military
[edit]- USS Capable (AM-155) was a United States Navy Admirable-class minesweeper during World War II
- USS Cole (DD-155) was a United States Navy Wickes-class destroyer during World War II
- USS General A. W. Brewster (AP-155) was a United States Navy General G. O. Squier-class transport during World War II
- USS Hopping (DE-155) was a United States Navy Buckley-class destroyer escort during World War II
- USS Lycoming (APA-155) was a United States Navy Haskell-class attack transport during World War II
- USS Mustang (IX-155) was a United States Navy four-master wooden schooner during World War II
- 155mm artillery, a common caliber
In sports
[edit]- The maximum possible score in a single break in snooker, with a free ball at the start of the break (147 is the highest possible without a free ball)
In transportation
[edit]- Alfa Romeo 155, a compact executive car produced from 1992 to 1998
- Seattle Bus Route 155
- London Bus Route 155
- The British Rail Class 155 is a diesel multiple unit British train
- Blériot 155 was a French airliner of the 1920s
- 155th Street, Manhattan, New York
- 155th Street New York City Subway stations:
In other fields
[edit]155 is also:
- The year AD 155 or 155 BC
- 155 is the number for the International Operator in the United Kingdom
- 155 is the number for the emergency medical services in the Czech Republic and Slovakia
- 155 AH is a year in the Islamic calendar that corresponds to 771–772 CE
- 155 Scylla is a main belt asteroid
- Europium-155 is a radioisotope or Europium and fission product with a half-life of 4.76 years
- 155, a 2007 song by the band +44
- The dialing code for Obihiro, Japan
- The atomic number of an element temporarily called unquintquinttium
- 155 North Wacker is a 46-story skyscraper in Chicago
- Wolseley No. 155, Saskatchewan, is a rural municipality in Canada
See also
[edit]- List of highways numbered 155
- United Nations Security Council Resolution 155
- United States Supreme Court cases, Volume 155
- Psalms 152–155
- McHenry County, Illinois Community High School District 155
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