22561407 has 12 divisors (see below), whose sum is σ = 35551464. Its totient is φ = 13673520.

The previous prime is 22561403. The next prime is 22561421. The reversal of 22561407 is 70416522.

22561407 is a `hidden beast` number, since 2 + 256 + 1 + 407 = 666.

It is not a de Polignac number, because 22561407 - 2² = 22561403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22561403) 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 11 ways as a sum of consecutive naturals, for example, 113848 + ... + 114045.

It is an arithmetic number, because the mean of its divisors is an integer number (2962622).

Almost surely, 2^22561407 is an apocalyptic number.

22561407 is a deficient number, since it is larger than the sum of its proper divisors (12990057).

22561407 is a wasteful number, since it uses less digits than its factorization.

22561407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227910 (or 227907 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 22561407 is about 4749.8849459750. The cubic root of 22561407 is about 282.5674029263.

Adding to 22561407 its reverse (70416522), we get a palindrome (92977929).

It can be divided in two parts, 2256 and 1407, that added together give a palindrome (3663).

The spelling of 22561407 in words is "twenty-two million, five hundred sixty-one thousand, four hundred seven".