22543564 has 12 divisors (see below), whose sum is σ = 41772024. Its totient is φ = 10608704.

The previous prime is 22543561. The next prime is 22543579. The reversal of 22543564 is 46534522.

It is not an unprimeable number, because it can be changed into a prime (22543561) 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, 165694 + ... + 165829.

It is an arithmetic number, because the mean of its divisors is an integer number (3481002).

Almost surely, 2^22543564 is an apocalyptic number.

It is an amenable number.

22543564 is a deficient number, since it is larger than the sum of its proper divisors (19228460).

22543564 is a wasteful number, since it uses less digits than its factorization.

22543564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331544 (or 331542 counting only the distinct ones).

The product of its digits is 28800, while the sum is 31.

The square root of 22543564 is about 4748.0063184457. The cubic root of 22543564 is about 282.4928925040.

The spelling of 22543564 in words is "twenty-two million, five hundred forty-three thousand, five hundred sixty-four".