Number
57
57 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 2
- Digit sum
- 12
- Digital root
- 3
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 80
Primality
Prime factorization: 3 × 19
Divisors & multiples
Aliquot sum (sum of proper divisors):
23
Representations
- In words
- fifty-seven
- Ordinal
- 57th
- Roman numeral
- LVII
- Binary
- 111001
- Octal
- 71
- Hexadecimal
- 39
Also seen as
ASCII character
As an ASCII codepoint, 57 is 9. Printable ASCII character 9.
Hex color
#000039
RGB(0, 0, 57)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.57.