25131560 has 16 divisors (see below), whose sum is σ = 56546100. Its totient is φ = 10052608.

The previous prime is 25131541. The next prime is 25131569. The reversal of 25131560 is 6513152.

It can be written as a sum of positive squares in 2 ways, for example, as 25020004 + 111556 = 5002^2 + 334^2 .

It is not an unprimeable number, because it can be changed into a prime (25131569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314105 + ... + 314184.

Almost surely, 2^25131560 is an apocalyptic number.

25131560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25131560 is an abundant number, since it is smaller than the sum of its proper divisors (31414540).

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

25131560 is a wasteful number, since it uses less digits than its factorization.

25131560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628300 (or 628296 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 25131560 is about 5013.1387373581. The cubic root of 25131560 is about 292.9137884251.

The spelling of 25131560 in words is "twenty-five million, one hundred thirty-one thousand, five hundred sixty".