25131117 has 16 divisors (see below), whose sum is σ = 38705472. Its totient is φ = 14334720.

The previous prime is 25131107. The next prime is 25131131. The reversal of 25131117 is 71113152.

It is a happy number.

It is not a de Polignac number, because 25131117 - 2¹⁸ = 24868973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25131093 and 25131102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21838 + ... + 22959.

It is an arithmetic number, because the mean of its divisors is an integer number (2419092).

Almost surely, 2^25131117 is an apocalyptic number.

It is an amenable number.

25131117 is a deficient number, since it is larger than the sum of its proper divisors (13574355).

25131117 is a wasteful number, since it uses less digits than its factorization.

25131117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44828.

The product of its digits is 210, while the sum is 21.

The square root of 25131117 is about 5013.0945532675. The cubic root of 25131117 is about 292.9120673280.

Adding to 25131117 its reverse (71113152), we get a palindrome (96244269).

The spelling of 25131117 in words is "twenty-five million, one hundred thirty-one thousand, one hundred seventeen".