555

Do you mean the number 555 or something else named 555 (e.g., the 555 timer IC in electronics)? Here are quick math facts in case that helps:

• Factorization: 555 = 3 × 5 × 37
• Prime factors: 3, 5, 37
• Divisibility: divisible by 3, 5, and 15; not by 9
• Decimal properties: 555 is a repdigit (all digits the same)
• Binary: 555 = 1000101011₂
• Hex: 0x22B
• Roman numerals: DLV
• Square: 555² = 308025
• Other factor pairs: 1×555, 3×185, 5×111, 15×37

If you meant something else (like the 555 timer circuit, base conversions, or a specific exam problem), tell me and I’ll tailor the help.