22218532 has 12 divisors (see below), whose sum is σ = 44437120. Its totient is φ = 9522216.

The previous prime is 22218509. The next prime is 22218551. The reversal of 22218532 is 23581222.

22218532 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 22218497 and 22218506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396732 + ... + 396787.

Almost surely, 2^22218532 is an apocalyptic number.

It is an amenable number.

22218532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22218532 is a wasteful number, since it uses less digits than its factorization.

22218532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793530 (or 793528 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 22218532 is about 4713.6537844861. The cubic root of 22218532 is about 281.1286586359.

Adding to 22218532 its reverse (23581222), we get a palindrome (45799754).

The spelling of 22218532 in words is "twenty-two million, two hundred eighteen thousand, five hundred thirty-two".