22540172 has 6 divisors (see below), whose sum is σ = 39445308. Its totient is φ = 11270084.

The previous prime is 22540169. The next prime is 22540237. The reversal of 22540172 is 27104522.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2817518 + ... + 2817525.

It is an arithmetic number, because the mean of its divisors is an integer number (6574218).

Almost surely, 2^22540172 is an apocalyptic number.

It is an amenable number.

22540172 is a deficient number, since it is larger than the sum of its proper divisors (16905136).

22540172 is a wasteful number, since it uses less digits than its factorization.

22540172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635047 (or 5635045 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22540172 is about 4747.6491024506. The cubic root of 22540172 is about 282.4787234348.

Adding to 22540172 its reverse (27104522), we get a palindrome (49644694).

The spelling of 22540172 in words is "twenty-two million, five hundred forty thousand, one hundred seventy-two".