Compare 21181 vs 21187
| Property | 21181 | 21187 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 591 × 3591 | 211871 |
| Prime factorization | 59 × 359 | 21187 |
| Divisors count | 4 | 2 |
| Divisors | 1, 59, 359, 21181 | 1, 21187 |
| Number of properties | 1 | 7 |
| Additive primes | 1107th | |
| Cousin primes (1st member) | 361st | |
| Harmonic primes | 874th | |
| Isolated primes | 1663rd | |
| Primes | 2382nd | |
| Prime triplets (1st member) | 178th | |
| Semiprimes | 5369th | |
| Sexy primes (1st member) | 722nd | |
| Roman numberals | ||
| Base 2 | 1010010101111012 | 1010010110000112 |
| Base 3 | 10020011113 | 10020012013 |
| Base 4 | 110223314 | 110230034 |
| Base 5 | 11342115 | 11342225 |
| Base 6 | 2420216 | 2420316 |
| Base 7 | 1155167 | 1155257 |
| Base 8 | 512758 | 513038 |
| Base 9 | 320449 | 320519 |
| Base 10 | 2118110 | 2118710 |
| Base 11 | 14a0611 | 14a1111 |
| Base 12 | 1031112 | 1031712 |
| Base 13 | 984413 | 984a13 |
| Base 14 | 7a0d14 | 7a1514 |
| Base 15 | 642115 | 642715 |
| Base 16 | 52bd16 | 52c316 |