25311361 has 2 divisors, whose sum is σ = 25311362. Its totient is φ = 25311360.

The previous prime is 25311359. The next prime is 25311373. The reversal of 25311361 is 16311352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 400 = 5031^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 25311361 - 2¹ = 25311359 is a prime.

Together with 25311359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25311301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655680 + 12655681.

It is an arithmetic number, because the mean of its divisors is an integer number (12655681).

Almost surely, 2^25311361 is an apocalyptic number.

It is an amenable number.

25311361 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311361 is an equidigital number, since it uses as much as digits as its factorization.

25311361 is an evil number, because the sum of its binary digits is even.

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

The square root of 25311361 is about 5031.0397533711. The cubic root of 25311361 is about 293.6106690372.

Subtracting from 25311361 its reverse (16311352), we obtain a palindrome (9000009).

The spelling of 25311361 in words is "twenty-five million, three hundred eleven thousand, three hundred sixty-one".