555

Do you want something specific about 555 (e.g., math, base conversions, or something like the 555 timer IC)? Here are quick facts you can use as a cheat sheet:

• Decimal: 555
• Prime factorization: 3 × 5 × 37
• Sum of digits: 5 + 5 + 5 = 15; digital root = 6
• Binary: 1000101011
• Hex: 0x22B
• Roman numeral: DLV
• If you meant the 555 timer IC (electronics): a versatile timer used to generate pulses, with classic configurations like astable and monostable modes.

Which direction would you like to go? I can expand any of these or help with a related problem.