Compare 640223 vs 640226
| Property | 640223 | 640226 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6402231 | 21 × 3201131 |
| Prime factorization | 640223 | 2 × 320113 |
| Divisors count | 2 | 4 |
| Divisors | 1, 640223 | 1, 2, 320113, 640226 |
| Number of properties | 5 | 1 |
| Additive primes | 20360th | |
| Cousin primes (2nd member) | 5633rd | |
| Isolated primes | 40829th | |
| Primes | 52094th | |
| Semiprimes | 137191st | |
| Sexy primes (1st member) | 11287th | |
| Roman numberals | ||
| Base 2 | 100111000100110111112 | 100111000100111000102 |
| Base 3 | 10121120122223 | 10121120200023 |
| Base 4 | 21301031334 | 21301032024 |
| Base 5 | 1304413435 | 1304414015 |
| Base 6 | 214155556 | 214200026 |
| Base 7 | 53043537 | 53043567 |
| Base 8 | 23423378 | 23423428 |
| Base 9 | 11751889 | 11752029 |
| Base 10 | 64022310 | 64022610 |
| Base 11 | 3a801111 | 3a801411 |
| Base 12 | 26a5bb12 | 26a60212 |
| Base 13 | 19553c13 | 19554213 |
| Base 14 | 12946314 | 12946614 |
| Base 15 | c9a6815 | c9a6b15 |
| Base 16 | 9c4df16 | 9c4e216 |