555

What would you like to do with 555? Here are quick facts in case you just want something handy:

• Decimal properties: 555 is odd; divisible by 3 and 5 (sum of digits is 15, so by 3; ends with 5, so by 5). Prime factorization: 3 × 5 × 37.
• Roman numeral: DLV
• Binary: 1000101011
• Hexadecimal: 0x22B

If you’re studying electronics, 555 also refers to the 555 timer IC, a common timer/oscillator.

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