Number
216
216 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 9
- Digital root
- 9
- Palindrome
- No
- Divisor count
- 16
- σ(n) — sum of divisors
- 600
Primality
Prime factorization: 2 3 × 3 3
Divisors & multiples
Aliquot sum (sum of proper divisors):
384
Representations
- In words
- two hundred sixteen
- Ordinal
- 216th
- Roman numeral
- CCXVI
- Binary
- 11011000
- Octal
- 330
- Hexadecimal
- D8
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 216, here are decompositions:
- 5 + 211 = 216
- 17 + 199 = 216
- 19 + 197 = 216
- 23 + 193 = 216
- 37 + 179 = 216
- 43 + 173 = 216
- 53 + 163 = 216
- 59 + 157 = 216
Showing the first eight; more decompositions exist.
Unicode codepoint
Ø
U+00D8
Uppercase letter (Lu)
UTF-8 encoding: C3 98 (2 bytes).
Hex color
#0000D8
RGB(0, 0, 216)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.216.