25231560 has 32 divisors (see below), whose sum is σ = 75695040. Its totient is φ = 6728384.

The previous prime is 25231513. The next prime is 25231561. The reversal of 25231560 is 6513252.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25231560.

It is not an unprimeable number, because it can be changed into a prime (25231561) 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, 105012 + ... + 105251.

It is an arithmetic number, because the mean of its divisors is an integer number (2365470).

Almost surely, 2^25231560 is an apocalyptic number.

25231560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25231560 is an abundant number, since it is smaller than the sum of its proper divisors (50463480).

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

25231560 is a wasteful number, since it uses less digits than its factorization.

25231560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210277 (or 210273 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25231560 is about 5023.1026268632. The cubic root of 25231560 is about 293.3017815007.

The spelling of 25231560 in words is "twenty-five million, two hundred thirty-one thousand, five hundred sixty".