23213218 has 16 divisors (see below), whose sum is σ = 39936960. Its totient is φ = 9912816.

The previous prime is 23213209. The next prime is 23213219. The reversal of 23213218 is 81231232.

It is not an unprimeable number, because it can be changed into a prime (23213219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (2496060).

It is a self-describing number.

Almost surely, 2^23213218 is an apocalyptic number.

23213218 is a deficient number, since it is larger than the sum of its proper divisors (16723742).

23213218 is a wasteful number, since it uses less digits than its factorization.

23213218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961.

The product of its digits is 576, while the sum is 22.

The square root of 23213218 is about 4818.0097550752. The cubic root of 23213218 is about 285.2627841977.

The spelling of 23213218 in words is "twenty-three million, two hundred thirteen thousand, two hundred eighteen".