555

Do you want math facts about the number 555, or something else (e.g., the 555 timer IC, base conversions, etc.)? Here are quick math notes in case that helps for exams:

• Prime factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555 (eight divisors)
• Sum of divisors (including 555): 912
• Digit sum: 5+5+5 = 15, so divisible by 3 and by 5
• Roman numeral: DLV
• Binary: 1000101011₂
• Base-3: 202120₃

If you meant the 555 timer IC or another context, tell me the subject and what you need (definitions, example problems, circuits, etc.).