22561604 has 12 divisors (see below), whose sum is σ = 42520044. Its totient is φ = 10413024.

The previous prime is 22561577. The next prime is 22561613. The reversal of 22561604 is 40616522.

It can be written as a sum of positive squares in 2 ways, for example, as 6240004 + 16321600 = 2498^2 + 4040^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216887 + ... + 216990.

It is an arithmetic number, because the mean of its divisors is an integer number (3543337).

Almost surely, 2^22561604 is an apocalyptic number.

It is an amenable number.

22561604 is a deficient number, since it is larger than the sum of its proper divisors (19958440).

22561604 is a wasteful number, since it uses less digits than its factorization.

22561604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433894 (or 433892 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22561604 is about 4749.9056832741. The cubic root of 22561604 is about 282.5682253576.

The spelling of 22561604 in words is "twenty-two million, five hundred sixty-one thousand, six hundred four".