25611317 has 2 divisors, whose sum is σ = 25611318. Its totient is φ = 25611316.

The previous prime is 25611307. The next prime is 25611323. The reversal of 25611317 is 71311652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23174596 + 2436721 = 4814^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 25611317 - 2¹² = 25607221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25611307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12805658 + 12805659.

It is an arithmetic number, because the mean of its divisors is an integer number (12805659).

Almost surely, 2^25611317 is an apocalyptic number.

It is an amenable number.

25611317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25611317 is an equidigital number, since it uses as much as digits as its factorization.

25611317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 25611317 is about 5060.7624919571. The cubic root of 25611317 is about 294.7659428520.

Adding to 25611317 its reverse (71311652), we get a palindrome (96922969).

The spelling of 25611317 in words is "twenty-five million, six hundred eleven thousand, three hundred seventeen".