25239571213 has 2 divisors, whose sum is σ = 25239571214. Its totient is φ = 25239571212.

The previous prime is 25239571199. The next prime is 25239571261. The reversal of 25239571213 is 31217593252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25218392809 + 21178404 = 158803^2 + 4602^2 .

It is a cyclic number.

It is not a de Polignac number, because 25239571213 - 2⁹ = 25239570701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25239571283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12619785606 + 12619785607.

It is an arithmetic number, because the mean of its divisors is an integer number (12619785607).

Almost surely, 2^25239571213 is an apocalyptic number.

It is an amenable number.

25239571213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25239571213 is an equidigital number, since it uses as much as digits as its factorization.

25239571213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The spelling of 25239571213 in words is "twenty-five billion, two hundred thirty-nine million, five hundred seventy-one thousand, two hundred thirteen".