555

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

• Factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555 (8 divisors)
• Digital sum: 5+5+5 = 15, so divisible by 3 and by 15; 555 / 15 = 37
• Properties: repdigit (three identical digits), palindrome
• Roman numeral: DLV
• Binary: 1000101011
• Hexadecimal: 0x22B
• Harshad number in base 10 (555 ÷ 15 = 37)

If you meant the 555 timer IC or something else, tell me the context and I’ll tailor it.