555

Nice — 555. Here are quick math-related facts you can use for exams:

• Factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555 (there are 8 divisors)
• Sum of divisors (including itself): 912
• Sum of proper divisors: 912 − 555 = 357 (so 555 is deficient)
• Digit sum: 5+5+5 = 15 (so divisible by 3, not by 9)
• Ends with 5 → divisible by 5

Representations:

• Binary: 1000101011₂
• Hex: 0x22B
• Base 6: 2323₆
• Roman numeral: DLV

Quick exam-style practice (solutions):

• Q1: Factor 555 → 3 × 5 × 37
• Q2: How many divisors? 8
• Q3: Sum of divisors is 912; sum of proper divisors is 357
• Q4: Write in binary and hex (above)

Would you like me to turn this into a short quiz, or focus on a different topic related to the number 555 (e.g., the 555 timer circuit, area codes, or another subject)? If you tell me your course, I can tailor more targeted problems.