555 (number)

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For the telephone numbers, see 555 (telephone number).
← 554 555 556 →
Cardinal five hundred fifty-five
Ordinal 555th
(five hundred and fifty-fifth)
Factorization 3 × 5 × 37
Roman numeral DLV
Binary 10001010112
Ternary 2021203
Quaternary 202234
Quinary 42105
Senary 23236
Octal 10538
Duodecimal 3A312
Hexadecimal 22B16
Vigesimal 17F20
Base 36 FF36

555 is the natural number following 554 and preceding 556.

Mathematical properties[edit]

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.


Other fields[edit]

Five hundred [and] fifty five is:

See also[edit]

External links[edit]

  • 555-LIST list of fictional phone numbers
  • [1] explanation of the song 'Heretic Anthem' by Slipknot which features 555 in the lyrics