22525257 has 16 divisors (see below), whose sum is σ = 32423040. Its totient is φ = 13867392.

The previous prime is 22525231. The next prime is 22525259. The reversal of 22525257 is 75252522.

It is not a de Polignac number, because 22525257 - 2⁸ = 22525001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22525259) 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, 3628 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (2026440).

Almost surely, 2^22525257 is an apocalyptic number.

It is an amenable number.

22525257 is a deficient number, since it is larger than the sum of its proper divisors (9897783).

22525257 is a wasteful number, since it uses less digits than its factorization.

22525257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312.

The product of its digits is 14000, while the sum is 30.

The square root of 22525257 is about 4746.0780650975. The cubic root of 22525257 is about 282.4164035939.

Adding to 22525257 its reverse (75252522), we get a palindrome (97777779).

The spelling of 22525257 in words is "twenty-two million, five hundred twenty-five thousand, two hundred fifty-seven".