22505238 has 24 divisors (see below), whose sum is σ = 55727568. Its totient is φ = 6430032.

The previous prime is 22505207. The next prime is 22505239. The reversal of 22505238 is 83250522.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89181 + ... + 89432.

It is an arithmetic number, because the mean of its divisors is an integer number (2321982).

Almost surely, 2^22505238 is an apocalyptic number.

22505238 is an abundant number, since it is smaller than the sum of its proper divisors (33222330).

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

22505238 is a wasteful number, since it uses less digits than its factorization.

22505238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178628 (or 178625 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 22505238 is about 4743.9685918016. The cubic root of 22505238 is about 282.3327142833.

The spelling of 22505238 in words is "twenty-two million, five hundred five thousand, two hundred thirty-eight".