25845215 has 16 divisors (see below), whose sum is σ = 35306496. Its totient is φ = 17978400.

The previous prime is 25845199. The next prime is 25845257. The reversal of 25845215 is 51254852.

It is not a de Polignac number, because 25845215 - 2⁴ = 25845199 is a prime.

It is a Duffinian number.

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, 8951 + ... + 11480.

It is an arithmetic number, because the mean of its divisors is an integer number (2206656).

Almost surely, 2^25845215 is an apocalyptic number.

25845215 is a deficient number, since it is larger than the sum of its proper divisors (9461281).

25845215 is a wasteful number, since it uses less digits than its factorization.

25845215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20470.

The product of its digits is 16000, while the sum is 32.

The square root of 25845215 is about 5083.8189385540. The cubic root of 25845215 is about 295.6605517989.

The spelling of 25845215 in words is "twenty-five million, eight hundred forty-five thousand, two hundred fifteen".