22657172 has 12 divisors (see below), whose sum is σ = 40721940. Its totient is φ = 11022336.

The previous prime is 22657171. The next prime is 22657183. The reversal of 22657172 is 27175622.

It can be written as a sum of positive squares in 2 ways, for example, as 19678096 + 2979076 = 4436^2 + 1726^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22657171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76397 + ... + 76692.

It is an arithmetic number, because the mean of its divisors is an integer number (3393495).

Almost surely, 2^22657172 is an apocalyptic number.

It is an amenable number.

22657172 is a deficient number, since it is larger than the sum of its proper divisors (18064768).

22657172 is a wasteful number, since it uses less digits than its factorization.

22657172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153130 (or 153128 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 22657172 is about 4759.9550418045. The cubic root of 22657172 is about 282.9666373453.

The spelling of 22657172 in words is "twenty-two million, six hundred fifty-seven thousand, one hundred seventy-two".