153
Number 153 properties
- Harshad
- Armstrong
- Triangular
- 153 is an odd number.
- 153 is triangular and equals T17.
- 153 is an Armstrong (or Narcissistic) number, which means it is the sum of its own digits each raised to the power of the number of digits.
- 153 is a Harshad number, which means it is divisible by the sum of its digits (153 = 9, and 153 is divisible by 9).
Prime factorization
Prime factorization of 153: 3^2 × 17.
Divisors
Divisor count: 6
1, 3, 9, 17, 51, 153
Factors of 153 are: 1, 3, 9, 17, 51, 153.
Representations
In octal, 153 is represented as 231.
In binary, 153 is represented as 10011001.
In hex, 153 is represented as 99.
Roman numeral: CLIII
Curiosities
- 153 is divisible by the sum of its digits.
- 153 equals the sum of its digits raised to the number of digits.
Related numbers
Nearby primes: 139, 149, 151, 157, 163, 167
Quick answers
Is 153 prime?
No, 153 is not prime.
What are the factors of 153?
1, 3, 9, 17, 51, 153
What is 153 in binary?
10011001