555

Do you want something about the number 555 (math properties), or something about the 555 timer IC, or a practice problem related to it? Here are a few quick facts in case that helps:

• Decimal 555 = 3 × 5 × 37
• Divisible by 3 and 5 (sum of digits = 15)
• Roman numeral: DLV
• Binary: 10000101011
• Hexadecimal: 0x22B
• Base-3: 202120₃

If you want, tell me what area you’re studying (factorization, bases, applications of 555 timer, etc.), and I’ll tailor a practice question or explanation.