555

What would you like to do with 555? Here are quick ideas you could use for exam prep:

• Factorization: 555 = 3 × 5 × 37
• Properties: sum of digits is 15, so 555 is a Harshad (Niven) number in base 10
• Roman numeral: DLV
• Binary: 555 = 1000101011₂
• Hexadecimal: 0x22B
• Base-7: 1422₇
• Palindrome: 555 is a palindromic number

Want me to turn this into a short practice problem, or dive into one of these topics? I can also generate a quick 5-question mini-quiz around it.