Compare 221987 vs 221999
| Property | 221987 | 221999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2219871 | 2219991 |
| Prime factorization | 221987 | 221999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 221987 | 1, 221999 |
| Number of properties | 6 | 4 |
| Additive primes | 8005th | |
| Chen primes | 8240th | 8241st |
| Happy primes | 3002nd | |
| Harmonic primes | 7425th | |
| Isolated primes | 15083rd | |
| Primes | 19774th | 19776th |
| Sophie germain primes | 2240th | |
| Twin primes (1st member) | 2347th | |
| Roman numberals | ||
| Base 2 | 1101100011001000112 | 1101100011001011112 |
| Base 3 | 1020211112023 | 1020211120123 |
| Base 4 | 3120302034 | 3120302334 |
| Base 5 | 241004225 | 241004445 |
| Base 6 | 44314156 | 44314356 |
| Base 7 | 16131237 | 16131417 |
| Base 8 | 6614438 | 6614578 |
| Base 9 | 3674529 | 3674659 |
| Base 10 | 22198710 | 22199910 |
| Base 11 | 14186711 | 14187811 |
| Base 12 | a856b12 | a857b12 |
| Base 13 | 7a06c13 | 7a07b13 |
| Base 14 | 5ac8314 | 5ac9114 |
| Base 15 | 45b9215 | 45b9e15 |
| Base 16 | 3632316 | 3632f16 |