555

Could you clarify what you want about 555? Here are a few quick options:

• Factorization: 555 = 3 × 5 × 37. Divisors: 1, 3, 5, 15, 37, 111, 185, 555.
• Sum/digit property: sum of digits = 15, and 555 is divisible by 15 (a Harshad/Niven number in base 10).
• Roman numeral: 555 = DLV (500 + 50 + 5).
• Binary: 555 = 1000101011₂.

Tell me which one you’d like (or another aspect), and I’ll go through a full solution.