22183218 has 12 divisors (see below), whose sum is σ = 48063678. Its totient is φ = 7394400.

The previous prime is 22183207. The next prime is 22183219. The reversal of 22183218 is 81238122.

It can be written as a sum of positive squares in only one way, i.e., 19740249 + 2442969 = 4443^2 + 1563^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22183191 and 22183200.

It is not an unprimeable number, because it can be changed into a prime (22183219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616183 + ... + 616218.

Almost surely, 2^22183218 is an apocalyptic number.

22183218 is an abundant number, since it is smaller than the sum of its proper divisors (25880460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22183218 is a wasteful number, since it uses less digits than its factorization.

22183218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232409 (or 1232406 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 22183218 is about 4709.9063684961. The cubic root of 22183218 is about 280.9796382624.

The spelling of 22183218 in words is "twenty-two million, one hundred eighty-three thousand, two hundred eighteen".