22157874 has 20 divisors (see below), whose sum is σ = 49650414. Its totient is φ = 7385904.

The previous prime is 22157867. The next prime is 22157879. The reversal of 22157874 is 47875122.

It can be written as a sum of positive squares in only one way, i.e., 22155849 + 2025 = 4707^2 + 45^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22157879) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 68227 + ... + 68550.

Almost surely, 2^22157874 is an apocalyptic number.

22157874 is an abundant number, since it is smaller than the sum of its proper divisors (27492540).

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

22157874 is a wasteful number, since it uses less digits than its factorization.

22157874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136791 (or 136782 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 22157874 is about 4707.2151002477. The cubic root of 22157874 is about 280.8725924525.

The spelling of 22157874 in words is "twenty-two million, one hundred fifty-seven thousand, eight hundred seventy-four".