Compare 221997 vs 221999
| Property | 221997 | 221999 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 739991 | 2219991 |
| Prime factorization | 3 × 73999 | 221999 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 73999, 221997 | 1, 221999 |
| Number of properties | 1 | 4 |
| Chen primes | 8241st | |
| Isolated primes | 15083rd | |
| Primes | 19776th | |
| Semiprimes | 49950th | |
| Sophie germain primes | 2240th | |
| Roman numberals | ||
| Base 2 | 1101100011001011012 | 1101100011001011112 |
| Base 3 | 1020211120103 | 1020211120123 |
| Base 4 | 3120302314 | 3120302334 |
| Base 5 | 241004425 | 241004445 |
| Base 6 | 44314336 | 44314356 |
| Base 7 | 16131367 | 16131417 |
| Base 8 | 6614558 | 6614578 |
| Base 9 | 3674639 | 3674659 |
| Base 10 | 22199710 | 22199910 |
| Base 11 | 14187611 | 14187811 |
| Base 12 | a857912 | a857b12 |
| Base 13 | 7a07913 | 7a07b13 |
| Base 14 | 5ac8d14 | 5ac9114 |
| Base 15 | 45b9c15 | 45b9e15 |
| Base 16 | 3632d16 | 3632f16 |