25611572 has 24 divisors (see below), whose sum is σ = 51502080. Its totient is φ = 10916640.

The previous prime is 25611557. The next prime is 25611577. The reversal of 25611572 is 27511652.

It is a super-2 number, since 2×25611572² = 1311905240622368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25611577) 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, 2954 + ... + 7742.

It is an arithmetic number, because the mean of its divisors is an integer number (2145920).

Almost surely, 2^25611572 is an apocalyptic number.

It is an amenable number.

25611572 is an abundant number, since it is smaller than the sum of its proper divisors (25890508).

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

25611572 is a wasteful number, since it uses less digits than its factorization.

25611572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991 (or 4989 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 25611572 is about 5060.7876857264. The cubic root of 25611572 is about 294.7669211313.

The spelling of 25611572 in words is "twenty-five million, six hundred eleven thousand, five hundred seventy-two".