25538117 has 4 divisors (see below), whose sum is σ = 27859776. Its totient is φ = 23216460.

The previous prime is 25538099. The next prime is 25538167. The reversal of 25538117 is 71183552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25538117 - 2⁸ = 25537861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25538167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160813 + ... + 1160834.

It is an arithmetic number, because the mean of its divisors is an integer number (6964944).

Almost surely, 2^25538117 is an apocalyptic number.

It is an amenable number.

25538117 is a deficient number, since it is larger than the sum of its proper divisors (2321659).

25538117 is a wasteful number, since it uses less digits than its factorization.

25538117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321658.

The product of its digits is 8400, while the sum is 32.

The square root of 25538117 is about 5053.5252052404. The cubic root of 25538117 is about 294.4848502386.

The spelling of 25538117 in words is "twenty-five million, five hundred thirty-eight thousand, one hundred seventeen".