odd, composite · 85th positive integer
The number 85
85 is an odd composite number. It is the 85th positive integer.
Quick reference
| Prime factorization | 5 × 17 |
| Divisors | 1, 5, 17, 85 |
| Binary | 1010101 |
| Hexadecimal | 0x55 |
| Roman numeral | LXXXV |
| Digit sum | 13 |
| Properties | odd, composite |
Frequently asked
Is 85 a prime number?
No. 85 is composite. Its prime factorization is 5 × 17.
What are the factors of 85?
The factors (divisors) of 85 are 1, 5, 17, 85.
What is 85 in binary?
85 in binary is 1010101. In hexadecimal it's 55.
What is 85 as a Roman numeral?
85 in Roman numerals is LXXXV.
What's the digit sum of 85?
Adding the digits of 85: 8 + 5 = 13.