The folowing table expresses '213' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|
| 2 | 11010101 | 101 | 10 | 1 | ||||
| 3 | 21220 | 21,10 | 1 | |||||
| 4 | 3111 | 12 | 3 | |||||
| 5 | 1323 | 14,10 | 1 | |||||
| 6 | 553 | 21 | 3 | |||||
| 7 | 423 | 12 | 3 | |||||
| 8 | 325 | 12 | 3 | |||||
| 9 | 256 | 14 | 5 | |||||
| 10 | 213 | 6 | ||||||
| 11 | 184 | 12 | 3 | |||||
| 12 | 159 | 13 | 4 | |||||
| 13 | 135 | 9 | ||||||
| 14 | 113 | 5 | ||||||
| 15 | E3,12 | 3 | ||||||
| 16 | D5,12 | 3 |
Factors: 3 * 71
213 is in the Pythagorean Triple: (213, 2516, 2525).