555

Do you want help with 555 in math, electronics, or something else? Here are quick math facts you can use in exams:

• Factorization: 555 = 3 × 5 × 37
• Divisors: 1, 3, 5, 15, 37, 111, 185, 555
• Number of divisors: 8
• Sum of divisors σ(555) = 912
• Euler totient φ(555) = 288
• Binary: 1000101011
• Hex: 0x22B

If you meant the 555 timer IC (electronics), I can help with that too, e.g., for an astable oscillator:

• t_high = 0.693 (R1 + R2) C
• t_low = 0.693 R2 C
• f = 1 / [0.693 (R1 + 2 R2) C]

Tell me which direction you want, or share a problem and I’ll solve it.