25644522 has 16 divisors (see below), whose sum is σ = 52130592. Its totient is φ = 8407920.

The previous prime is 25644511. The next prime is 25644523. The reversal of 25644522 is 22544652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25644522.

It is not an unprimeable number, because it can be changed into a prime (25644523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34668 + ... + 35399.

It is an arithmetic number, because the mean of its divisors is an integer number (3258162).

Almost surely, 2^25644522 is an apocalyptic number.

25644522 is an abundant number, since it is smaller than the sum of its proper divisors (26486070).

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

25644522 is a wasteful number, since it uses less digits than its factorization.

25644522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70133.

The product of its digits is 19200, while the sum is 30.

The square root of 25644522 is about 5064.0420614367. The cubic root of 25644522 is about 294.8932755759.

The spelling of 25644522 in words is "twenty-five million, six hundred forty-four thousand, five hundred twenty-two".