odd, composite · 243rd positive integer
The number 243
243 is an odd composite number. It is the 243rd positive integer.
Quick reference
| Prime factorization | 3 × 3 × 3 × 3 × 3 |
| Divisors | 1, 3, 9, 27, 81, 243 |
| Binary | 11110011 |
| Hexadecimal | 0xF3 |
| Roman numeral | CCXLIII |
| Digit sum | 9 |
| Properties | odd, composite |
Frequently asked
Is 243 a prime number?
No. 243 is composite. Its prime factorization is 3 × 3 × 3 × 3 × 3.
What are the factors of 243?
The factors (divisors) of 243 are 1, 3, 9, 27, 81, 243.
What is 243 in binary?
243 in binary is 11110011. In hexadecimal it's F3.
What is 243 as a Roman numeral?
243 in Roman numerals is CCXLIII.
What's the digit sum of 243?
Adding the digits of 243: 2 + 4 + 3 = 9.