Compare 1523 vs 1531
| Property | 1523 | 1531 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 15231 | 15311 |
| Prime factorization | 1523 | 1531 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1523 | 1, 1531 |
| Number of properties | 7 | 5 |
| Additive primes | 131st | |
| Centered decagonal primes | 13th | |
| Emirps | 74th | |
| Isolated primes | 142nd | 143rd |
| Left-truncatable primes | 59th | |
| Long primes | 91st | |
| Primes | 241st | 242nd |
| Safe primes | 34th | |
| Super primes | 53rd | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXIII | MDXXXI |
| Base 2 | 101111100112 | 101111110112 |
| Base 3 | 20021023 | 20022013 |
| Base 4 | 1133034 | 1133234 |
| Base 5 | 220435 | 221115 |
| Base 6 | 110156 | 110316 |
| Base 7 | 43047 | 43157 |
| Base 8 | 27638 | 27738 |
| Base 9 | 20729 | 20819 |
| Base 10 | 152310 | 153110 |
| Base 11 | 116511 | 117211 |
| Base 12 | a6b12 | a7712 |
| Base 13 | 90213 | 90a13 |
| Base 14 | 7ab14 | 7b514 |
| Base 15 | 6b815 | 6c115 |
| Base 16 | 5f316 | 5fb16 |