Compare 1529 vs 1531
| Property | 1529 | 1531 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 1391 | 15311 |
| Prime factorization | 11 × 139 | 1531 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 139, 1529 | 1, 1531 |
| Number of properties | 1 | 5 |
| Centered decagonal primes | 13th | |
| Isolated primes | 143rd | |
| Long primes | 91st | |
| Primes | 242nd | |
| Semiprimes | 446th | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXIX | MDXXXI |
| Base 2 | 101111110012 | 101111110112 |
| Base 3 | 20021223 | 20022013 |
| Base 4 | 1133214 | 1133234 |
| Base 5 | 221045 | 221115 |
| Base 6 | 110256 | 110316 |
| Base 7 | 43137 | 43157 |
| Base 8 | 27718 | 27738 |
| Base 9 | 20789 | 20819 |
| Base 10 | 152910 | 153110 |
| Base 11 | 117011 | 117211 |
| Base 12 | a7512 | a7712 |
| Base 13 | 90813 | 90a13 |
| Base 14 | 7b314 | 7b514 |
| Base 15 | 6be15 | 6c115 |
| Base 16 | 5f916 | 5fb16 |