25515385 has 64 divisors (see below), whose sum is σ = 40711680. Its totient is φ = 14929920.

The previous prime is 25515379. The next prime is 25515397. The reversal of 25515385 is 58351552.

It is not a de Polignac number, because 25515385 - 2³ = 25515377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25515385.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 418255 + ... + 418315.

It is an arithmetic number, because the mean of its divisors is an integer number (636120).

Almost surely, 2^25515385 is an apocalyptic number.

It is an amenable number.

25515385 is a deficient number, since it is larger than the sum of its proper divisors (15196295).

25515385 is a wasteful number, since it uses less digits than its factorization.

25515385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146.

The product of its digits is 30000, while the sum is 34.

The square root of 25515385 is about 5051.2755814744. The cubic root of 25515385 is about 294.3974486391.

The spelling of 25515385 in words is "twenty-five million, five hundred fifteen thousand, three hundred eighty-five".