25317117 has 20 divisors (see below), whose sum is σ = 43223136. Its totient is φ = 14466600.

The previous prime is 25317073. The next prime is 25317119. The reversal of 25317117 is 71171352.

It is a happy number.

It is not a de Polignac number, because 25317117 - 2⁶ = 25317053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25317119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21759 + ... + 22892.

Almost surely, 2^25317117 is an apocalyptic number.

25317117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25317117 is a deficient number, since it is larger than the sum of its proper divisors (17906019).

25317117 is an equidigital number, since it uses as much as digits as its factorization.

25317117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44670 (or 44661 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 25317117 is about 5031.6117696023. The cubic root of 25317117 is about 293.6329237988.

Adding to 25317117 its reverse (71171352), we get a palindrome (96488469).

The spelling of 25317117 in words is "twenty-five million, three hundred seventeen thousand, one hundred seventeen".