# 555 (number)

From HandWiki

__: Natural number__

**Short description**
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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 | 1000101011_{2} | |||

Ternary | 202120_{3} | |||

Quaternary | 20223_{4} | |||

Quinary | 4210_{5} | |||

Senary | 2323_{6} | |||

Octal | 1053_{8} | |||

Duodecimal | 3A3_{12} | |||

Hexadecimal | 22B_{16} | |||

Vigesimal | 17F_{20} | |||

Base 36 | FF_{36} |

**555** (**five hundred [and] fifty-five**) is the natural number following 554 and preceding 556.

## In mathematics

It 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.

## Telephone numbers

The NANP reserves telephone numbers in many dialing areas in the 555 local block for fictional purposes, such as 1-308-555-3485.^{[1]}

## External links

Original source: https://en.wikipedia.org/wiki/555 (number).
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