25523172 has 36 divisors (see below), whose sum is σ = 64889916. Its totient is φ = 8458560.

The previous prime is 25523167. The next prime is 25523177. The reversal of 25523172 is 27132552.

It is an interprime number because it is at equal distance from previous prime (25523167) and next prime (25523177).

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 17089956 = 2904^2 + 4134^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (25523177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4558 + ... + 8474.

Almost surely, 2^25523172 is an apocalyptic number.

It is an amenable number.

25523172 is an abundant number, since it is smaller than the sum of its proper divisors (39366744).

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

25523172 is a wasteful number, since it uses less digits than its factorization.

25523172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4103 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 25523172 is about 5052.0463180775. The cubic root of 25523172 is about 294.4273944902.

The spelling of 25523172 in words is "twenty-five million, five hundred twenty-three thousand, one hundred seventy-two".