Number
1,531
1,531 is a prime, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 10
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 2
- σ(n) — sum of divisors
- 1,532
Primality
1,531 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Representations
- In words
- one thousand five hundred thirty-one
- Ordinal
- 1531st
- Roman numeral
- MDXXXI
- Binary
- 10111111011
- Octal
- 2773
- Hexadecimal
- 5FB