22297156 has 18 divisors (see below), whose sum is σ = 45391038. Its totient is φ = 9555840.

The previous prime is 22297151. The next prime is 22297157. The reversal of 22297156 is 65179222.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 4064256 = 4270^2 + 2016^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22297151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56685 + ... + 57076.

Almost surely, 2^22297156 is an apocalyptic number.

It is an amenable number.

22297156 is an abundant number, since it is smaller than the sum of its proper divisors (23093882).

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

22297156 is a wasteful number, since it uses less digits than its factorization.

22297156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113779 (or 113770 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 22297156 is about 4721.9864464016. The cubic root of 22297156 is about 281.4598752156.

The spelling of 22297156 in words is "twenty-two million, two hundred ninety-seven thousand, one hundred fifty-six".