22564538 has 8 divisors (see below), whose sum is σ = 34485588. Its totient is φ = 11069344.

The previous prime is 22564537. The next prime is 22564543. The reversal of 22564538 is 83546522.

It can be written as a sum of positive squares in 2 ways, for example, as 21836929 + 727609 = 4673^2 + 853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 22564498 and 22564507.

It is not an unprimeable number, because it can be changed into a prime (22564537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106331 + ... + 106542.

Almost surely, 2^22564538 is an apocalyptic number.

22564538 is a deficient number, since it is larger than the sum of its proper divisors (11921050).

22564538 is a wasteful number, since it uses less digits than its factorization.

22564538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212928.

The product of its digits is 57600, while the sum is 35.

The square root of 22564538 is about 4750.2145214716. The cubic root of 22564538 is about 282.5804735889.

The spelling of 22564538 in words is "twenty-two million, five hundred sixty-four thousand, five hundred thirty-eight".