25311613 has 2 divisors, whose sum is σ = 25311614. Its totient is φ = 25311612.

The previous prime is 25311607. The next prime is 25311619. The reversal of 25311613 is 31611352.

25311613 = 3557² + 3558².

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (25311607) and next prime (25311619).

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 12652249 = 3558^2 + 3557^2 .

It is a cyclic number.

It is not a de Polignac number, because 25311613 - 2⁹ = 25311101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25311619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655806 + 12655807.

It is an arithmetic number, because the mean of its divisors is an integer number (12655807).

Almost surely, 2^25311613 is an apocalyptic number.

25311613 is the 3558-th centered square number.

It is an amenable number.

25311613 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311613 is an equidigital number, since it uses as much as digits as its factorization.

25311613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 25311613 is about 5031.0647978336. The cubic root of 25311613 is about 293.6116434302.

Adding to 25311613 its reverse (31611352), we get a palindrome (56922965).

The spelling of 25311613 in words is "twenty-five million, three hundred eleven thousand, six hundred thirteen".