Compare 1801 vs 1951
| Property | 1801 | 1951 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18011 | 19511 |
| Prime factorization | 1801 | 1951 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1801 | 1, 1951 |
| Number of properties | 7 | 3 |
| Chen primes | 174th | |
| Cuban primes 1 | 13th | 14th |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 279th | 297th |
| Pythagorean primes | 136th | |
| Twin primes (2nd member) | 60th | |
| Roman numberals | MDCCCI | MCMLI |
| Base 2 | 111000010012 | 111100111112 |
| Base 3 | 21102013 | 22000213 |
| Base 4 | 1300214 | 1321334 |
| Base 5 | 242015 | 303015 |
| Base 6 | 122016 | 130116 |
| Base 7 | 51527 | 54557 |
| Base 8 | 34118 | 36378 |
| Base 9 | 24219 | 26079 |
| Base 10 | 180110 | 195110 |
| Base 11 | 139811 | 151411 |
| Base 12 | 106112 | 116712 |
| Base 13 | a8713 | b7113 |
| Base 14 | 92914 | 9d514 |
| Base 15 | 80115 | 8a115 |
| Base 16 | 70916 | 79f16 |