22530521 has 16 divisors (see below), whose sum is σ = 25740288. Its totient is φ = 19569600.

The previous prime is 22530511. The next prime is 22530527. The reversal of 22530521 is 12503522.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22530521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22530493 and 22530502.

It is not an unprimeable number, because it can be changed into a prime (22530527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14156 + ... + 15666.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^22530521 is an apocalyptic number.

It is an amenable number.

22530521 is a deficient number, since it is larger than the sum of its proper divisors (3209767).

22530521 is a wasteful number, since it uses less digits than its factorization.

22530521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 22530521 is about 4746.6325958515. The cubic root of 22530521 is about 282.4384014807.

The spelling of 22530521 in words is "twenty-two million, five hundred thirty thousand, five hundred twenty-one".