25515165 has 32 divisors (see below), whose sum is σ = 45884160. Its totient is φ = 12013056.

The previous prime is 25515121. The next prime is 25515167. The reversal of 25515165 is 56151552.

It is not a de Polignac number, because 25515165 - 2¹⁰ = 25514141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25515167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1641 + ... + 7329.

It is an arithmetic number, because the mean of its divisors is an integer number (1433880).

Almost surely, 2^25515165 is an apocalyptic number.

It is an amenable number.

25515165 is a deficient number, since it is larger than the sum of its proper divisors (20368995).

25515165 is a wasteful number, since it uses less digits than its factorization.

25515165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733.

The product of its digits is 7500, while the sum is 30.

The square root of 25515165 is about 5051.2538047499. The cubic root of 25515165 is about 294.3966025140.

The spelling of 25515165 in words is "twenty-five million, five hundred fifteen thousand, one hundred sixty-five".