25575915 has 16 divisors (see below), whose sum is σ = 41483808. Its totient is φ = 13453056.

The previous prime is 25575911. The next prime is 25575929. The reversal of 25575915 is 51957552.

It is not a de Polignac number, because 25575915 - 2² = 25575911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25575911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10584 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (2592738).

Almost surely, 2^25575915 is an apocalyptic number.

25575915 is a deficient number, since it is larger than the sum of its proper divisors (15907893).

25575915 is a wasteful number, since it uses less digits than its factorization.

25575915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23438.

The product of its digits is 78750, while the sum is 39.

The square root of 25575915 is about 5057.2635881473. The cubic root of 25575915 is about 294.6300639126.

The spelling of 25575915 in words is "twenty-five million, five hundred seventy-five thousand, nine hundred fifteen".