odd, composite, Fibonacci, triangular, palindrome · 55th positive integer
The number 55
55 is an odd composite number. It is the 55th positive integer.
Quick reference
| Prime factorization | 5 × 11 |
| Divisors | 1, 5, 11, 55 |
| Binary | 110111 |
| Hexadecimal | 0x37 |
| Roman numeral | LV |
| Digit sum | 10 |
| Properties | odd, composite, Fibonacci, triangular, palindrome |
Frequently asked
Is 55 a prime number?
No. 55 is composite. Its prime factorization is 5 × 11.
What are the factors of 55?
The factors (divisors) of 55 are 1, 5, 11, 55.
What is 55 in binary?
55 in binary is 110111. In hexadecimal it's 37.
What is 55 as a Roman numeral?
55 in Roman numerals is LV.
What's the digit sum of 55?
Adding the digits of 55: 5 + 5 = 10.