| Base 10 | 505 (3 digits) | ||
| Digit Sum: 10 | Digital Root: 1 | sad | |
| Base 2 | 0b111111001 (9 digits) | ||
| Digit Sum: 0b111 | Digital Root: 0b1 | always happy | |
| Base 8 | 0771 (3 digits) | ||
| Digit Sum: 017 | Digital Root: 01 | sad | |
| Base 16 | 0x1f9 (3 digits) | ||
| Digit Sum: 0x19 | Digital Root: 0xa | sad | |
More about this number at Positiv Integers and Number Empire.
The number is not a prime.
Its 2 (2 unique) factors are:
5
101
Its 4 divisors are:
1
5
101
505
Its aliquote sum is: 
107
makeing it a
deficient
number.
| In HTML this number represents this color: | 
 ⇧↑⇧↑⇧↑ #0001F9 ⇩↓⇩↓⇩↓  | 
As Unicode codepoint (since version 3.0) this number represents this character:ǹ LATIN SMALL LETTER N WITH GRAVE in Latin_Ext_B (Source: https://www.unicode.org/Public/UCD/latest/ucdxml/ucd.all.grouped.zip); HTML: ǹ
In the work of Johann Sebastian Bach BWV 505 is Vergiss mein nicht (Geistliches Lied)
The number appears at position 131 of the decimal digits of π surrounded by
3282306647093844609550582231725359408128481 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: 1018.001ms; cpu: 81.5900000000003ms)