Number
172
172 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 10
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 308
Primality
Prime factorization: 2 2 × 43
Divisors & multiples
Aliquot sum (sum of proper divisors):
136
Representations
- In words
- one hundred seventy-two
- Ordinal
- 172nd
- Roman numeral
- CLXXII
- Binary
- 10101100
- Octal
- 254
- Hexadecimal
- AC
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 172, here are decompositions:
- 5 + 167 = 172
- 23 + 149 = 172
- 41 + 131 = 172
- 59 + 113 = 172
- 71 + 101 = 172
- 83 + 89 = 172
Unicode codepoint
¬
U+00AC
Math symbol (Sm)
UTF-8 encoding: C2 AC (2 bytes).
Hex color
#0000AC
RGB(0, 0, 172)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.172.