25665315 has 16 divisors (see below), whose sum is σ = 44223648. Its totient is φ = 12635136.

The previous prime is 25665259. The next prime is 25665317. The reversal of 25665315 is 51356652.

It is not a de Polignac number, because 25665315 - 2⁶ = 25665251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25665317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65614 + ... + 66003.

It is an arithmetic number, because the mean of its divisors is an integer number (2763978).

Almost surely, 2^25665315 is an apocalyptic number.

25665315 is a deficient number, since it is larger than the sum of its proper divisors (18558333).

25665315 is a wasteful number, since it uses less digits than its factorization.

25665315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131638.

The product of its digits is 27000, while the sum is 33.

The square root of 25665315 is about 5066.0946497277. The cubic root of 25665315 is about 294.9729554830.

The spelling of 25665315 in words is "twenty-five million, six hundred sixty-five thousand, three hundred fifteen".