25523520 has 112 divisors (see below), whose sum is σ = 88440768. Its totient is φ = 6184960.

The previous prime is 25523483. The next prime is 25523539. The reversal of 25523520 is 2532552.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9352 + ... + 11768.

Almost surely, 2^25523520 is an apocalyptic number.

25523520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25523520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44220384).

25523520 is an abundant number, since it is smaller than the sum of its proper divisors (62917248).

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

25523520 is a wasteful number, since it uses less digits than its factorization.

25523520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 25523520 is about 5052.0807594495. The cubic root of 25523520 is about 294.4287326242.

It can be divided in two parts, 255235 and 20, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 25523520 in words is "twenty-five million, five hundred twenty-three thousand, five hundred twenty".