Number
518
518 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 14
- Digital root
- 5
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 912
Primality
Prime factorization: 2 × 7 × 37
Divisors & multiples
Aliquot sum (sum of proper divisors):
394
Representations
- In words
- five hundred eighteen
- Ordinal
- 518th
- Roman numeral
- DXVIII
- Binary
- 1000000110
- Octal
- 1006
- Hexadecimal
- 206
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 518, here are decompositions:
- 19 + 499 = 518
- 31 + 487 = 518
- 61 + 457 = 518
- 79 + 439 = 518
- 97 + 421 = 518
- 109 + 409 = 518
- 139 + 379 = 518
- 151 + 367 = 518
Showing the first eight; more decompositions exist.
Unicode codepoint
Ȇ
U+0206
Uppercase letter (Lu)
UTF-8 encoding: C8 86 (2 bytes).
Hex color
#000206
RGB(0, 2, 6)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.6.
Possible US bank routing number
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Routing number
000000518
Federal Reserve
United States Government
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.