22561004 has 6 divisors (see below), whose sum is σ = 39481764. Its totient is φ = 11280500.

The previous prime is 22561003. The next prime is 22561027. The reversal of 22561004 is 40016522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22561001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820122 + ... + 2820129.

It is an arithmetic number, because the mean of its divisors is an integer number (6580294).

Almost surely, 2^22561004 is an apocalyptic number.

It is an amenable number.

22561004 is a deficient number, since it is larger than the sum of its proper divisors (16920760).

22561004 is a wasteful number, since it uses less digits than its factorization.

22561004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640255 (or 5640253 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22561004 is about 4749.8425237054. The cubic root of 22561004 is about 282.5657204760.

Adding to 22561004 its reverse (40016522), we get a palindrome (62577526).

The spelling of 22561004 in words is "twenty-two million, five hundred sixty-one thousand, four".