555

Here are quick math/representation facts about 555 you can use on exams:

• Decimal: 555
• Prime factorization: 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555
• Sum of digits: 5+5+5 = 15 (so divisible by 3 and by 15)
• Harshad number: 555 ÷ 15 = 37
• Roman numeral: DLV
• Binary: 1000101011
• Hexadecimal: 0x22B
• In words: five hundred fifty-five
• Example problem: gcd(555, 270) = 15; lcm(555, 270) = 9,990
• Last quick check: 555 mod 7 = 2

Would you like a quick practice problem using 555, or details on a specific topic (divisibility, factorization, or number representations)?