Compare 1531 vs 1542
| Property | 1531 | 1542 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 15311 | 21 × 31 × 2571 |
| Prime factorization | 1531 | 2 × 3 × 257 |
| Divisors count | 2 | 8 |
| Divisors | 1, 1531 | 1, 2, 3, 6, 257, 514, 771, 1542 |
| Number of properties | 5 | 0 |
| Centered decagonal primes | 13th | |
| Isolated primes | 143rd | |
| Long primes | 91st | |
| Primes | 242nd | |
| Ulam primes | 22nd | |
| Roman numberals | MDXXXI | MDXLII |
| Base 2 | 101111110112 | 110000001102 |
| Base 3 | 20022013 | 20100103 |
| Base 4 | 1133234 | 1200124 |
| Base 5 | 221115 | 221325 |
| Base 6 | 110316 | 110506 |
| Base 7 | 43157 | 43327 |
| Base 8 | 27738 | 30068 |
| Base 9 | 20819 | 21039 |
| Base 10 | 153110 | 154210 |
| Base 11 | 117211 | 118211 |
| Base 12 | a7712 | a8612 |
| Base 13 | 90a13 | 91813 |
| Base 14 | 7b514 | 7c214 |
| Base 15 | 6c115 | 6cc15 |
| Base 16 | 5fb16 | 60616 |