odd, composite, triangular · 153rd positive integer
The number 153
153 is an odd composite number. It is the 153rd positive integer.
Quick reference
| Prime factorization | 3 × 3 × 17 |
| Divisors | 1, 3, 9, 17, 51, 153 |
| Binary | 10011001 |
| Hexadecimal | 0x99 |
| Roman numeral | CLIII |
| Digit sum | 9 |
| Properties | odd, composite, triangular |
Frequently asked
Is 153 a prime number?
No. 153 is composite. Its prime factorization is 3 × 3 × 17.
What are the factors of 153?
The factors (divisors) of 153 are 1, 3, 9, 17, 51, 153.
What is 153 in binary?
153 in binary is 10011001. In hexadecimal it's 99.
What is 153 as a Roman numeral?
153 in Roman numerals is CLIII.
What's the digit sum of 153?
Adding the digits of 153: 1 + 5 + 3 = 9.