| Base 10 | 31 (2 digits) | ||
| Digit Sum: 4 | Digital Root: 4 | happy | |
| Base 2 | 0b11111 (5 digits) | ||
| Digit Sum: 0b101 | Digital Root: 0b1 | always happy | |
| Base 8 | 037 (2 digits) | ||
| Digit Sum: 012 | Digital Root: 03 | sad | |
| Base 16 | 0x1f (2 digits) | ||
| Digit Sum: 0x10 | Digital Root: 0x1 | sad | |
More about this number at Positiv Integers and Number Empire.
The number is a Mersenne Prime: 25 - 1
It is related to a perfect number: 496
It is a Twin prime for 29.
It is a Sexy prime for 37.
| In HTML this number represents this color: |
⇧↑⇧↑⇧↑ #00001F ⇩↓⇩↓⇩↓ |
In the work of Johann Sebastian Bach BWV 31 is Der Himmel lacht! Die Erde jubilieret [Leipziger Fassung]
The number appears at position 137 of the decimal digits of π surrounded by
664709384460955058223172535940812848111745 Source: The Pi-Search Page
Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 864.966ms; cpu: 82.5709999999997ms)