odd, composite, triangular, palindrome · 171st positive integer
The number 171
171 is an odd composite number. It is the 171st positive integer.
Quick reference
| Prime factorization | 3 × 3 × 19 |
| Divisors | 1, 3, 9, 19, 57, 171 |
| Binary | 10101011 |
| Hexadecimal | 0xAB |
| Roman numeral | CLXXI |
| Digit sum | 9 |
| Properties | odd, composite, triangular, palindrome |
Frequently asked
Is 171 a prime number?
No. 171 is composite. Its prime factorization is 3 × 3 × 19.
What are the factors of 171?
The factors (divisors) of 171 are 1, 3, 9, 19, 57, 171.
What is 171 in binary?
171 in binary is 10101011. In hexadecimal it's AB.
What is 171 as a Roman numeral?
171 in Roman numerals is CLXXI.
What's the digit sum of 171?
Adding the digits of 171: 1 + 7 + 1 = 9.