Number
815
815 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 14
- Digital root
- 5
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 984
Primality
Prime factorization: 5 × 163
Divisors & multiples
Aliquot sum (sum of proper divisors):
169
Representations
- In words
- eight hundred fifteen
- Ordinal
- 815th
- Roman numeral
- DCCCXV
- Binary
- 1100101111
- Octal
- 1457
- Hexadecimal
- 32F
Also seen as
Unicode codepoint
̯
U+032F
Non-spacing mark (Mn)
UTF-8 encoding: CC AF (2 bytes).
Hex color
#00032F
RGB(0, 3, 47)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.47.