555

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

• Decimal: 555
• Prime factorization: 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555 (8 divisors)
• Binary: 1000101011
• Hex: 0x22B
• Roman numeral: DLV
• Harshad number: 555 is divisible by the sum of its digits (5+5+5 = 15; 555 / 15 = 37)

If you meant the 555 timer IC, I can give you quick basics or typical formulas (e.g., astable and monostable modes). Which would you like?