22530906 has 16 divisors (see below), whose sum is σ = 50068800. Its totient is φ = 7510284.

The previous prime is 22530901. The next prime is 22530917. The reversal of 22530906 is 60903522.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22530906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208566 + ... + 208673.

It is an arithmetic number, because the mean of its divisors is an integer number (3129300).

Almost surely, 2^22530906 is an apocalyptic number.

22530906 is an abundant number, since it is smaller than the sum of its proper divisors (27537894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22530906 is a wasteful number, since it uses less digits than its factorization.

22530906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417250 (or 417244 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 22530906 is about 4746.6731507446. The cubic root of 22530906 is about 282.4400102342.

It can be divided in two parts, 22530 and 906, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 22530906 in words is "twenty-two million, five hundred thirty thousand, nine hundred six".