22530981 has 16 divisors (see below), whose sum is σ = 32855040. Its totient is φ = 13620720.

The previous prime is 22530971. The next prime is 22530983. The reversal of 22530981 is 18903522.

It is a happy number.

It is not a de Polignac number, because 22530981 - 2⁶ = 22530917 is a prime.

It is a super-2 number, since 2×22530981² = 1015290209644722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530983) 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, 19876 + ... + 20978.

It is an arithmetic number, because the mean of its divisors is an integer number (2053440).

Almost surely, 2^22530981 is an apocalyptic number.

It is an amenable number.

22530981 is a deficient number, since it is larger than the sum of its proper divisors (10324059).

22530981 is a wasteful number, since it uses less digits than its factorization.

22530981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 22530981 is about 4746.6810510082. The cubic root of 22530981 is about 282.4403236256.

The spelling of 22530981 in words is "twenty-two million, five hundred thirty thousand, nine hundred eighty-one".