Compare 21131 vs 21139
| Property | 21131 | 21139 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 111 × 171 × 1131 | 211391 |
| Prime factorization | 11 × 17 × 113 | 21139 |
| Divisors count | 8 | 2 |
| Divisors | 1, 11, 17, 113, 187, 1243, 1921, 21131 | 1, 21139 |
| Number of properties | 0 | 5 |
| Cousin primes (1st member) | 360th | |
| Good primes | 266th | |
| Isolated primes | 1656th | |
| Lucky primes | 385th | |
| Primes | 2375th | |
| Roman numberals | ||
| Base 2 | 1010010100010112 | 1010010100100112 |
| Base 3 | 10012221223 | 10012222213 |
| Base 4 | 110220234 | 110221034 |
| Base 5 | 11340115 | 11340245 |
| Base 6 | 2414556 | 2415116 |
| Base 7 | 1154157 | 1154267 |
| Base 8 | 512138 | 512238 |
| Base 9 | 318789 | 318879 |
| Base 10 | 2113110 | 2113910 |
| Base 11 | 1497011 | 1497811 |
| Base 12 | 1028b12 | 1029712 |
| Base 13 | 980613 | 981113 |
| Base 14 | 79b514 | 79bd14 |
| Base 15 | 63db15 | 63e415 |
| Base 16 | 528b16 | 529316 |