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Natural number From Wikipedia, the free encyclopedia
555 (five hundred [and] fifty-five) is the natural number following 554 and preceding 556.
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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 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]
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