555

Not quite sure what you want with "555." Do you mean:

• math properties (factorization, bases, etc.)
• a conversion (binary/hex/base-3, etc.)
• the 555 timer IC (electronics)
• something else (e.g., Roman numeral, meme, year)?

Here are a few quick math facts to get started:

• Prime factorization: 555 = 3 × 5 × 37
• Divisible by: 3 and 5 (ends with 5)
• Roman numeral: DLV
• Binary: 555 = 1000101011₂
• Hex: 0x22B
• Base-3: 555 = 202120₃
• In words: five hundred fifty-five

If you can tell me the context or the exact task, I’ll tailor the answer.