22725261 has 36 divisors (see below), whose sum is σ = 36236928. Its totient is φ = 13714272.

The previous prime is 22725259. The next prime is 22725271. The reversal of 22725261 is 16252722.

It is not a de Polignac number, because 22725261 - 2¹ = 22725259 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22725211) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 101796 + ... + 102018.

Almost surely, 2^22725261 is an apocalyptic number.

It is an amenable number.

22725261 is a deficient number, since it is larger than the sum of its proper divisors (13511667).

22725261 is a wasteful number, since it uses less digits than its factorization.

22725261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 306 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 22725261 is about 4767.1019498223. The cubic root of 22725261 is about 283.2498095981.

Adding to 22725261 its reverse (16252722), we get a palindrome (38977983).

The spelling of 22725261 in words is "twenty-two million, seven hundred twenty-five thousand, two hundred sixty-one".