25165830 has 32 divisors (see below), whose sum is σ = 60578784. Its totient is φ = 6690816.

The previous prime is 25165813. The next prime is 25165843. The reversal of 25165830 is 3856152.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 10854 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (1893087).

Almost surely, 2^25165830 is an apocalyptic number.

25165830 is an abundant number, since it is smaller than the sum of its proper divisors (35412954).

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

25165830 is a wasteful number, since it uses less digits than its factorization.

25165830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 25165830 is about 5016.5555912399. Note that the first 4 decimals coincide. The cubic root of 25165830 is about 293.0468693829.

The spelling of 25165830 in words is "twenty-five million, one hundred sixty-five thousand, eight hundred thirty".