22536172 has 12 divisors (see below), whose sum is σ = 39938080. Its totient is φ = 11125296.

The previous prime is 22536167. The next prime is 22536193. The reversal of 22536172 is 27163522.

It is a self number, because there is not a number n which added to its sum of digits gives 22536172.

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, 35343 + ... + 35974.

Almost surely, 2^22536172 is an apocalyptic number.

22536172 is the 2538-th centered heptagonal number.

It is an amenable number.

22536172 is a deficient number, since it is larger than the sum of its proper divisors (17401908).

22536172 is a wasteful number, since it uses less digits than its factorization.

22536172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71400 (or 71398 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 22536172 is about 4747.2278226350. The cubic root of 22536172 is about 282.4620128001.

Adding to 22536172 its reverse (27163522), we get a palindrome (49699694).

The spelling of 22536172 in words is "twenty-two million, five hundred thirty-six thousand, one hundred seventy-two".