Compare 1522 vs 1531
| Property | 1522 | 1531 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 7611 | 15311 |
| Prime factorization | 2 × 761 | 1531 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 761, 1522 | 1, 1531 |
| Number of properties | 1 | 5 |
| Centered decagonal primes | 13th | |
| Isolated primes | 143rd | |
| Long primes | 91st | |
| Primes | 242nd | |
| Semiprimes | 444th | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXII | MDXXXI |
| Base 2 | 101111100102 | 101111110112 |
| Base 3 | 20021013 | 20022013 |
| Base 4 | 1133024 | 1133234 |
| Base 5 | 220425 | 221115 |
| Base 6 | 110146 | 110316 |
| Base 7 | 43037 | 43157 |
| Base 8 | 27628 | 27738 |
| Base 9 | 20719 | 20819 |
| Base 10 | 152210 | 153110 |
| Base 11 | 116411 | 117211 |
| Base 12 | a6a12 | a7712 |
| Base 13 | 90113 | 90a13 |
| Base 14 | 7aa14 | 7b514 |
| Base 15 | 6b715 | 6c115 |
| Base 16 | 5f216 | 5fb16 |