25138215 has 32 divisors (see below), whose sum is σ = 46238400. Its totient is φ = 12942720.

The previous prime is 25138181. The next prime is 25138247. The reversal of 25138215 is 51283152.

It is a happy number.

It is not a de Polignac number, because 25138215 - 2⁶ = 25138151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 705 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (1444950).

Almost surely, 2^25138215 is an apocalyptic number.

25138215 is a deficient number, since it is larger than the sum of its proper divisors (21100185).

25138215 is a wasteful number, since it uses less digits than its factorization.

25138215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464 (or 6458 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 25138215 is about 5013.8024492395. The cubic root of 25138215 is about 292.9396412999.

The spelling of 25138215 in words is "twenty-five million, one hundred thirty-eight thousand, two hundred fifteen".