226665218 has 32 divisors (see below), whose sum is σ = 380162160. Its totient is φ = 100638720.

The previous prime is 226665209. The next prime is 226665227. The reversal of 226665218 is 812566622.

It is an interprime number because it is at equal distance from previous prime (226665209) and next prime (226665227).

It can be written as a sum of positive squares in 8 ways, for example, as 126405049 + 100260169 = 11243^2 + 10013^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392546 + ... + 393122.

Almost surely, 2^226665218 is an apocalyptic number.

226665218 is a deficient number, since it is larger than the sum of its proper divisors (153496942).

226665218 is a wasteful number, since it uses less digits than its factorization.

226665218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its digits is 69120, while the sum is 38.

The square root of 226665218 is about 15055.4049430761. The cubic root of 226665218 is about 609.7169859762.

The spelling of 226665218 in words is "two hundred twenty-six million, six hundred sixty-five thousand, two hundred eighteen".