22223218 has 16 divisors (see below), whose sum is σ = 35064576. Its totient is φ = 10548720.

The previous prime is 22223207. The next prime is 22223219. The reversal of 22223218 is 81232222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22223219) 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, 96 + ... + 6667.

It is an arithmetic number, because the mean of its divisors is an integer number (2191536).

Almost surely, 2^22223218 is an apocalyptic number.

22223218 is a deficient number, since it is larger than the sum of its proper divisors (12841358).

22223218 is a wasteful number, since it uses less digits than its factorization.

22223218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849.

The product of its digits is 768, while the sum is 22.

The square root of 22223218 is about 4714.1508249100. The cubic root of 22223218 is about 281.1484210621.

The spelling of 22223218 in words is "twenty-two million, two hundred twenty-three thousand, two hundred eighteen".