odd, composite · 217th positive integer
The number 217
217 is an odd composite number. It is the 217th positive integer.
Quick reference
| Prime factorization | 7 × 31 |
| Divisors | 1, 7, 31, 217 |
| Binary | 11011001 |
| Hexadecimal | 0xD9 |
| Roman numeral | CCXVII |
| Digit sum | 10 |
| Properties | odd, composite |
Frequently asked
Is 217 a prime number?
No. 217 is composite. Its prime factorization is 7 × 31.
What are the factors of 217?
The factors (divisors) of 217 are 1, 7, 31, 217.
What is 217 in binary?
217 in binary is 11011001. In hexadecimal it's D9.
What is 217 as a Roman numeral?
217 in Roman numerals is CCXVII.
What's the digit sum of 217?
Adding the digits of 217: 2 + 1 + 7 = 10.