Factorization
216 = 2 × 2 × 2 × 3 × 3 × 3
216 has 16 divisors: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 216
Sum of all divisors other than 216:
384216 = 6 3
Sums & differences
Difference of 2 squares: 216 = 152 - 32 = 212 - 152 = 292 - 252 = 552 - 532
Goldbach conjecture: 216 = 211 + 5 = 199 + 17 = 197 + 19 = 193 + 23 = 179 + 37 = 173 + 43 = 163 + 53 = 157 + 59 = 149 + 67 = 137 + 79 = . . . (only the first 10 pairs are shown)
