25530165 has 24 divisors (see below), whose sum is σ = 45197568. Its totient is φ = 13325280.

The previous prime is 25530157. The next prime is 25530187. The reversal of 25530165 is 56103552.

It is not a de Polignac number, because 25530165 - 2³ = 25530157 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 3921 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (1883232).

Almost surely, 2^25530165 is an apocalyptic number.

It is an amenable number.

25530165 is a deficient number, since it is larger than the sum of its proper divisors (19667403).

25530165 is a wasteful number, since it uses less digits than its factorization.

25530165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129 (or 12126 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 25530165 is about 5052.7383664702. The cubic root of 25530165 is about 294.4542817277.

The spelling of 25530165 in words is "twenty-five million, five hundred thirty thousand, one hundred sixty-five".