555

Nice. 555 could mean a few different things. What would you like help with?

• Electronics: quick refresher on the 555 timer IC (monostable vs. astable, key formulas)

  • If you want, I can give a brief explanation and a worked example.

• Math/number theory: properties of the number 555

  • Prime factorization: 555 = 3 × 5 × 37
  • Divisors: 1, 3, 5, 15, 37, 111, 185, 555
  • Sum of divisors: 912

• Something else: you name the topic and I’ll tailor it.

Tell me which one you’d like, or share a problem you’re working on.