25165165 has 8 divisors (see below), whose sum is σ = 30329208. Its totient is φ = 20044800.

The previous prime is 25165159. The next prime is 25165171. The reversal of 25165165 is 56156152.

It is an interprime number because it is at equal distance from previous prime (25165159) and next prime (25165171).

It can be written as a sum of positive squares in 4 ways, for example, as 3663396 + 21501769 = 1914^2 + 4637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25165165 - 2¹³ = 25156973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9636 + ... + 11965.

It is an arithmetic number, because the mean of its divisors is an integer number (3791151).

Almost surely, 2^25165165 is an apocalyptic number.

It is an amenable number.

25165165 is a deficient number, since it is larger than the sum of its proper divisors (5164043).

25165165 is a wasteful number, since it uses less digits than its factorization.

25165165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839.

The product of its digits is 9000, while the sum is 31.

The square root of 25165165 is about 5016.4893102647. The cubic root of 25165165 is about 293.0442881331.

The spelling of 25165165 in words is "twenty-five million, one hundred sixty-five thousand, one hundred sixty-five".