Number
345
345 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 3
- Digit sum
- 12
- Digital root
- 3
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 576
Primality
Prime factorization: 3 × 5 × 23
Divisors & multiples
Aliquot sum (sum of proper divisors):
231
Representations
- In words
- three hundred forty-five
- Ordinal
- 345th
- Roman numeral
- CCCXLV
- Binary
- 101011001
- Octal
- 531
- Hexadecimal
- 159
Also seen as
Unicode codepoint
ř
U+0159
Lowercase letter (Ll)
UTF-8 encoding: C5 99 (2 bytes).
Hex color
#000159
RGB(0, 1, 89)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.89.