555

Nice. How would you like to use or analyze the number 555? Here are some quick bits and a few practice prompts you can use in exam prep:

Quick facts

• Prime factorization: 555 = 3 × 5 × 37
• Binary: 555 = 1000101011₂
• Hexadecimal: 555 = 0x22B
• Roman numeral: DLV
• 555 as a sum of consecutive integers: 277 + 278 = 555
• 555 as a sum of three consecutive integers: 184 + 185 + 186 = 555

Quick practice questions

• Is 555 divisible by 9? (Sum of digits = 5+5+5 = 15; not divisible by 9)
• Write 555 as a sum of three consecutive integers. (Answer: 184 + 185 + 186)
• How many positive divisors does 555 have? (Since 555 = 3 × 5 × 37, number of divisors = (1+1)(1+1)(1+1) = 8)
• Convert 555 from decimal to base 7. (Hint: 555₁₀ = 1422₇)
• Convert 555₁₀ to base 16. (Hint: 0x22B)

If you tell me your subject area (e.g., number theory, algebra, discrete math) and what you need (factoring, base conversions, problem sets), I can tailor a short practice set or explanations.