Compare 21997 vs 21998
Property | 21997 | 21998 |
---|---|---|
Type | prime | composite number |
Unique factors | 1 | 3 |
Total factors | 1 | 3 |
Prime factorization | 219971 | 21 × 171 × 6471 |
Prime factorization | 21997 | 2 × 17 × 647 |
Divisors count | 2 | 8 |
Divisors | 1, 21997 | 1, 2, 17, 34, 647, 1294, 10999, 21998 |
Number of properties | 8 | 0 |
Chen primes | 1209th | |
Isolated primes | 1721st | |
Left-truncatable primes | 173rd | |
Primes | 2464th | |
Pythagorean primes | 1223rd | |
Sexy primes (1st member) | 743rd | |
Sexy primes (2nd member) | 742nd | |
Sexy prime triplets (2nd member) | 202nd | |
Roman numberals | ||
Base 2 | 1010101111011012 | 1010101111011102 |
Base 3 | 10100112013 | 10100112023 |
Base 4 | 111132314 | 111132324 |
Base 5 | 12004425 | 12004435 |
Base 6 | 2455016 | 2455026 |
Base 7 | 1210637 | 1210647 |
Base 8 | 527558 | 527568 |
Base 9 | 331519 | 331529 |
Base 10 | 2199710 | 2199810 |
Base 11 | 1558811 | 1558911 |
Base 12 | 1089112 | 1089212 |
Base 13 | a02113 | a02213 |
Base 14 | 803314 | 803414 |
Base 15 | 67b715 | 67b815 |
Base 16 | 55ed16 | 55ee16 |