Compare 61 vs 1531
| Property | 61 | 1531 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 611 | 15311 |
| Prime factorization | 61 | 1531 |
| Divisors count | 2 | 2 |
| Divisors | 1, 61 | 1, 1531 |
| Number of properties | 12 | 5 |
| Additive primes | 11th | |
| Centered decagonal primes | 3rd | 13th |
| Centered square primes | 4th | |
| Cuban primes 1 | 4th | |
| Isolated primes | 143rd | |
| Long primes | 8th | 91st |
| Primes | 18th | 242nd |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Twin primes (2nd member) | 7th | |
| Ulam primes | 22nd | |
| Roman numberals | LXI | MDXXXI |
| Base 2 | 1111012 | 101111110112 |
| Base 3 | 20213 | 20022013 |
| Base 4 | 3314 | 1133234 |
| Base 5 | 2215 | 221115 |
| Base 6 | 1416 | 110316 |
| Base 7 | 1157 | 43157 |
| Base 8 | 758 | 27738 |
| Base 9 | 679 | 20819 |
| Base 10 | 6110 | 153110 |
| Base 11 | 5611 | 117211 |
| Base 12 | 5112 | a7712 |
| Base 13 | 4913 | 90a13 |
| Base 14 | 4514 | 7b514 |
| Base 15 | 4115 | 6c115 |
| Base 16 | 3d16 | 5fb16 |