Compare 1655 vs 1661
| Property | 1655 | 1661 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 3311 | 111 × 1511 |
| Prime factorization | 5 × 331 | 11 × 151 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 331, 1655 | 1, 11, 151, 1661 |
| Number of properties | 1 | 1 |
| Semiprimes | 477th | 479th |
| Roman numberals | MDCLV | MDCLXI |
| Base 2 | 110011101112 | 110011111012 |
| Base 3 | 20210223 | 20211123 |
| Base 4 | 1213134 | 1213314 |
| Base 5 | 231105 | 231215 |
| Base 6 | 113556 | 114056 |
| Base 7 | 45537 | 45627 |
| Base 8 | 31678 | 31758 |
| Base 9 | 22389 | 22459 |
| Base 10 | 165510 | 166110 |
| Base 11 | 127511 | 128011 |
| Base 12 | b5b12 | b6512 |
| Base 13 | 9a413 | 9aa13 |
| Base 14 | 86314 | 86914 |
| Base 15 | 75515 | 75b15 |
| Base 16 | 67716 | 67d16 |