| ||||
|---|---|---|---|---|
| Cardinal | five hundred fifty-five | |||
| Ordinal | 555th (five hundred fifty-fifth) | |||
| Factorization | 3 × 5 × 37 | |||
| Greek numeral | ΦΝΕ´ | |||
| Roman numeral | DLV | |||
| Binary | 10001010112 | |||
| Ternary | 2021203 | |||
| Senary | 23236 | |||
| Octal | 10538 | |||
| Duodecimal | 3A312 | |||
| Hexadecimal | 22B16 | |||
555 (five hundred [and] fifty-five) is the natural number following 554 and preceding 556.
In mathematics
[edit]555 is a sphenic number. In base 10, it is a repdigit, and because it is divisible by the sum of its digits, it is a Harshad number. It is also a Harshad number in binary, base 11, base 13 and hexadecimal.
It is the sum of the first triplet of three-digit permutable primes in decimal:
- .
It is the twenty-sixth number such that its Euler totient (288) is equal to the totient value of its sum-of-divisors: .[1]
References
[edit]- ^ Sloane, N. J. A. (ed.). "Sequence A006872 (Numbers k such that phi(k) is phi(sigma(k)).)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2023-08-31.
External links
[edit]
Media related to 555 (number) at Wikimedia Commons
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