22539965 has 16 divisors (see below), whose sum is σ = 31059072. Its totient is φ = 15382464.

The previous prime is 22539961. The next prime is 22539967. The reversal of 22539965 is 56993522.

It is a cyclic number.

It is not a de Polignac number, because 22539965 - 2² = 22539961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22539961) 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, 6527 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (1941192).

Almost surely, 2^22539965 is an apocalyptic number.

It is an amenable number.

22539965 is a deficient number, since it is larger than the sum of its proper divisors (8519107).

22539965 is a wasteful number, since it uses less digits than its factorization.

22539965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076.

The product of its digits is 145800, while the sum is 41.

The square root of 22539965 is about 4747.6273021374. The cubic root of 22539965 is about 282.4778587080.

The spelling of 22539965 in words is "twenty-two million, five hundred thirty-nine thousand, nine hundred sixty-five".