25117131 has 8 divisors (see below), whose sum is σ = 36065680. Its totient is φ = 15456672.

The previous prime is 25117111. The next prime is 25117151. The reversal of 25117131 is 13171152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25117111) and next prime (25117151).

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

It is not a de Polignac number, because 25117131 - 2⁷ = 25117003 is a prime.

It is a super-2 number, since 2×25117131² = 1261740539342322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25117098 and 25117107.

It is not an unprimeable number, because it can be changed into a prime (25117111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321976 + ... + 322053.

It is an arithmetic number, because the mean of its divisors is an integer number (4508210).

Almost surely, 2^25117131 is an apocalyptic number.

25117131 is a deficient number, since it is larger than the sum of its proper divisors (10948549).

25117131 is a wasteful number, since it uses less digits than its factorization.

25117131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644045.

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

The square root of 25117131 is about 5011.6994123750. The cubic root of 25117131 is about 292.8577199841.

Adding to 25117131 its reverse (13171152), we get a palindrome (38288283).

The spelling of 25117131 in words is "twenty-five million, one hundred seventeen thousand, one hundred thirty-one".