555

Nice. How would you like to work with 555? Here are quick facts you can use in exams, plus ready-made options:

Quick facts

• Decimal factorization: 555 = 3 × 5 × 37
• Is it prime? No (composite)
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555
• Number of divisors: 8
• Sum of divisors: 912
• Roman numeral: DLV
• Binary: 1000101011
• Hex: 0x22B
• Octal: 1053

Practice options (pick one or I can do all)

• A) Short problem set: prove the factorization, list divisors, compute sum of divisors, and count divisors.
• B) Base conversions: convert 555 to binary, hex, and octal (answers above).
• C) A quick number theory question: compute sigma(555) and verify using prime factorization.
• D) A couple of quick exam-style questions (with solutions) on 555’s properties.

Tell me which option you want, or specify another area (e.g., 555 in modular arithmetic, or a Roman numerals problem).