The folowing table expresses '581' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1001000101 | 100 | 1 | |||||||
| 3 | 210112 | 21,10 | 1 | |||||||
| 4 | 21011 | 11 | 2 | |||||||
| 5 | 4311 | 14,10 | 1 | |||||||
| 6 | 2405 | 15,10 | 1 | |||||||
| 7 | 1460 | 14 | 5 | |||||||
| 8 | 1105 | 7 | ||||||||
| 9 | 715 | 14 | 5 | |||||||
| 10 | 581 | 14 | 5 | |||||||
| 11 | 489 | 1A,10 | 1 | |||||||
| 12 | 405 | 9 | ||||||||
| 13 | 359 | 14 | 5 | |||||||
| 14 | 2D7 | 18 | 9 | |||||||
| 15 | 28B | 16 | 7 | |||||||
| 16 | 245 | B |
Factors: 7 * 83
581 is in the Pythagorean Triple: (581, 3420, 3469).