Compare 61 vs 331
| Property | 61 | 331 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 611 | 3311 |
| Prime factorization | 61 | 331 |
| Divisors count | 2 | 2 |
| Divisors | 1, 61 | 1, 331 |
| Number of properties | 12 | 10 |
| Additive primes | 11th | 39th |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Cuban primes 1 | 4th | 7th |
| Good primes | 24th | |
| Happy primes | 17th | |
| Harmonic primes | 28th | |
| Isolated primes | 28th | |
| Long primes | 8th | |
| Lucky primes | 19th | |
| Primes | 18th | 67th |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | 37th |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Super primes | 19th | |
| Twin primes (2nd member) | 7th | |
| Roman numberals | LXI | CCCXXXI |
| Base 2 | 1111012 | 1010010112 |
| Base 3 | 20213 | 1100213 |
| Base 4 | 3314 | 110234 |
| Base 5 | 2215 | 23115 |
| Base 6 | 1416 | 13116 |
| Base 7 | 1157 | 6527 |
| Base 8 | 758 | 5138 |
| Base 9 | 679 | 4079 |
| Base 10 | 6110 | 33110 |
| Base 11 | 5611 | 28111 |
| Base 12 | 5112 | 23712 |
| Base 13 | 4913 | 1c613 |
| Base 14 | 4514 | 19914 |
| Base 15 | 4115 | 17115 |
| Base 16 | 3d16 | 14b16 |