555

Could you tell me what you want to do with 555? Quick math facts, or practice problems, or something else? Here are a few quick math notes to get you started in case that helps for exams:

• Prime factorization: 555 = 3 × 5 × 37
• In other bases:
  • Binary (base 2): 555 = 1000101011_2
  • Hexadecimal (base 16): 555 = 0x22B
  • Base 5: 555 = 4210_5
  • Base 3: 555 = 202120_3
• Roman numerals: 555 = DLV
• Sum of digits: 5 + 5 + 5 = 15, and 555 ÷ 15 = 37, so 555 is a Harshad (Niven) number (divisible by the sum of its digits)
• Decimal to time: 555 minutes = 9 hours 15 minutes
• A quick check: not a prime (it has factors 3, 5, and 37)

If you’d like, I can generate a short set of practice problems (with solutions) based on these facts, or tailor problems to a specific exam topic (e.g., factoring, base conversions, or Roman numerals). What would you prefer?