22157568 has 108 divisors (see below), whose sum is σ = 65367120. Its totient is φ = 7216128.

The previous prime is 22157549. The next prime is 22157581. The reversal of 22157568 is 86575122.

It is a happy number.

22157568 is a `hidden beast` number, since 2 + 21 + 575 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135855 + ... + 136017.

Almost surely, 2^22157568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22157568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32683560).

22157568 is an abundant number, since it is smaller than the sum of its proper divisors (43209552).

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

22157568 is a wasteful number, since it uses less digits than its factorization.

22157568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 227 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 22157568 is about 4707.1825968407. The cubic root of 22157568 is about 280.8712994974.

The spelling of 22157568 in words is "twenty-two million, one hundred fifty-seven thousand, five hundred sixty-eight".