555

Do you want quick math facts about 555, or some practice problems using it? Here are a few quick notes you can use in exams:

• Prime factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555
• Sum of digits: 5+5+5 = 15, so divisible by 3; ends with 5, so divisible by 5; hence divisible by 15
• Roman numeral: DLV
• Base conversions:
  • Binary: 555 decimal = 1000101011₂
  • Hexadecimal: 555 decimal = 0x22B
  • Base 6: 555 decimal = 5*(6^2) + 5*(6) + 5 = 215
• Representations as sums of consecutive integers:
  • 555 = 277 + 278 (2 consecutive)
  • 555 = 184 + 185 + 186 (3 consecutive)
  • 555 = 109 + 110 + 111 + 112 + 113 (5 consecutive)
• Quick check: 555 = 3 × 5 × 37 → product of three primes

If you share your course topic (algebra, number theory, computing, etc.), I can tailor practice problems specifically for your exam. What would you prefer?