25231613243 has 2 divisors, whose sum is σ = 25231613244. Its totient is φ = 25231613242.

The previous prime is 25231613227. The next prime is 25231613261. The reversal of 25231613243 is 34231613252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25231613243 - 2⁴ = 25231613227 is a prime.

It is not a weakly prime, because it can be changed into another prime (25231613263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12615806621 + 12615806622.

It is an arithmetic number, because the mean of its divisors is an integer number (12615806622).

Almost surely, 2^25231613243 is an apocalyptic number.

25231613243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25231613243 is an equidigital number, since it uses as much as digits as its factorization.

25231613243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

Subtracting 25231613243 from its reverse (34231613252), we obtain a palindrome (9000000009).

The spelling of 25231613243 in words is "twenty-five billion, two hundred thirty-one million, six hundred thirteen thousand, two hundred forty-three".