Compare 21857 vs 21859
| Property | 21857 | 21859 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 19871 | 218591 |
| Prime factorization | 11 × 1987 | 21859 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 1987, 21857 | 1, 21859 |
| Number of properties | 1 | 5 |
| Cousin primes (1st member) | 373rd | |
| Harmonic primes | 903rd | |
| Isolated primes | 1709th | |
| Long primes | 928th | |
| Primes | 2452nd | |
| Semiprimes | 5519th | |
| Roman numberals | ||
| Base 2 | 1010101011000012 | 1010101011000112 |
| Base 3 | 10022221123 | 10022221213 |
| Base 4 | 111112014 | 111112034 |
| Base 5 | 11444125 | 11444145 |
| Base 6 | 2451056 | 2451116 |
| Base 7 | 1205037 | 1205057 |
| Base 8 | 525418 | 525438 |
| Base 9 | 328759 | 328779 |
| Base 10 | 2185710 | 2185910 |
| Base 11 | 1547011 | 1547211 |
| Base 12 | 1079512 | 1079712 |
| Base 13 | 9c4413 | 9c4613 |
| Base 14 | 7d7314 | 7d7514 |
| Base 15 | 672215 | 672415 |
| Base 16 | 556116 | 556316 |