odd, composite, perfect square · 225th positive integer
The number 225
225 is an odd composite number. It is the 225th positive integer.
Quick reference
| Prime factorization | 3 × 3 × 5 × 5 |
| Divisors | 1, 3, 5, 9, 15, 25, 45, 75, 225 |
| Binary | 11100001 |
| Hexadecimal | 0xE1 |
| Roman numeral | CCXXV |
| Digit sum | 9 |
| Properties | odd, composite, perfect square |
Frequently asked
Is 225 a prime number?
No. 225 is composite. Its prime factorization is 3 × 3 × 5 × 5.
What are the factors of 225?
The factors (divisors) of 225 are 1, 3, 5, 9, 15, 25, 45, 75, 225.
What is 225 in binary?
225 in binary is 11100001. In hexadecimal it's E1.
What is 225 as a Roman numeral?
225 in Roman numerals is CCXXV.
What's the digit sum of 225?
Adding the digits of 225: 2 + 2 + 5 = 9.