Compare 218981 vs 218987
| Property | 218981 | 218987 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 72 × 411 × 1091 | 2189871 |
| Prime factorization | 7 × 7 × 41 × 109 | 218987 |
| Divisors count | 12 | 2 |
| Divisors | 1, 7, 41, 49, 109, 287, 763, 2009, 4469, 5341, 31283, 218981 | 1, 218987 |
| Number of properties | 0 | 6 |
| Chen primes | 8141st | |
| Happy primes | 2966th | |
| Primes | 19525th | |
| Prime triplets (1st member) | 902nd | |
| Sexy primes (1st member) | 4619th | |
| Twin primes (1st member) | 2320th | |
| Roman numberals | ||
| Base 2 | 1101010111011001012 | 1101010111011010112 |
| Base 3 | 1020101011023 | 1020101011223 |
| Base 4 | 3111312114 | 3111312234 |
| Base 5 | 240014115 | 240014225 |
| Base 6 | 44054456 | 44054556 |
| Base 7 | 16013007 | 16013067 |
| Base 8 | 6535458 | 6535538 |
| Base 9 | 3633429 | 3633489 |
| Base 10 | 21898110 | 21898710 |
| Base 11 | 13a58411 | 13a58a11 |
| Base 12 | a688512 | a688b12 |
| Base 13 | 7889913 | 788a213 |
| Base 14 | 59b3714 | 59b3d14 |
| Base 15 | 44d3b15 | 44d4215 |
| Base 16 | 3576516 | 3576b16 |