Number
556
556 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 16
- Digital root
- 7
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 980
Primality
Prime factorization: 2 2 × 139
Divisors & multiples
Aliquot sum (sum of proper divisors):
424
Representations
- In words
- five hundred fifty-six
- Ordinal
- 556th
- Roman numeral
- DLVI
- Binary
- 1000101100
- Octal
- 1054
- Hexadecimal
- 22C
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 556, here are decompositions:
- 47 + 509 = 556
- 53 + 503 = 556
- 89 + 467 = 556
- 107 + 449 = 556
- 113 + 443 = 556
- 137 + 419 = 556
- 167 + 389 = 556
- 173 + 383 = 556
Showing the first eight; more decompositions exist.
Unicode codepoint
Ȭ
U+022C
Uppercase letter (Lu)
UTF-8 encoding: C8 AC (2 bytes).
Hex color
#00022C
RGB(0, 2, 44)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.44.