25116631 has 2 divisors, whose sum is σ = 25116632. Its totient is φ = 25116630.

The previous prime is 25116629. The next prime is 25116643. The reversal of 25116631 is 13661152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25116631 - 2¹ = 25116629 is a prime.

It is a super-2 number, since 2×25116631² = 1261690305580322, which contains 22 as substring.

Together with 25116629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25116596 and 25116605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25116131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558315 + 12558316.

It is an arithmetic number, because the mean of its divisors is an integer number (12558316).

Almost surely, 2^25116631 is an apocalyptic number.

25116631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25116631 is an equidigital number, since it uses as much as digits as its factorization.

25116631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 25116631 is about 5011.6495288478. The cubic root of 25116631 is about 292.8557766912.

Adding to 25116631 its reverse (13661152), we get a palindrome (38777783).

The spelling of 25116631 in words is "twenty-five million, one hundred sixteen thousand, six hundred thirty-one".