22538109 has 16 divisors (see below), whose sum is σ = 33007104. Its totient is φ = 13566000.

The previous prime is 22538081. The next prime is 22538111. The reversal of 22538109 is 90183522.

It is a happy number.

It is not a de Polignac number, because 22538109 - 2⁵ = 22538077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22538119) 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, 2722 + ... + 7244.

It is an arithmetic number, because the mean of its divisors is an integer number (2062944).

Almost surely, 2^22538109 is an apocalyptic number.

It is an amenable number.

22538109 is a deficient number, since it is larger than the sum of its proper divisors (10468995).

22538109 is a wasteful number, since it uses less digits than its factorization.

22538109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688.

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

The square root of 22538109 is about 4747.4318320540. The cubic root of 22538109 is about 282.4701051719.

The spelling of 22538109 in words is "twenty-two million, five hundred thirty-eight thousand, one hundred nine".