555

What would you like to do with 555? Here are some quick facts to get started, in case you just want a reference or a quick exam-friendly note:

• Factors: 555 = 3 × 5 × 37
• Sum of digits: 5 + 5 + 5 = 15; 555 ÷ 15 = 37 (so a Harshad number in base 10)
• Roman numeral: DLV
• Binary: 1000101011
• Hexadecimal: 0x22B
• Decimal property: repdigit (all digits are the same)

If you want, I can:

• create a quick practice problem using 555,
• show how to derive each of these,
• or tailor to a subject (number theory, base conversions, modular arithmetic, etc.). What do you prefer?