25316887213 has 2 divisors, whose sum is σ = 25316887214. Its totient is φ = 25316887212.

The previous prime is 25316887199. The next prime is 25316887229. The reversal of 25316887213 is 31278861352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13787926084 + 11528961129 = 117422^2 + 107373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25316887213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25316887243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658443606 + 12658443607.

It is an arithmetic number, because the mean of its divisors is an integer number (12658443607).

Almost surely, 2^25316887213 is an apocalyptic number.

It is an amenable number.

25316887213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25316887213 is an equidigital number, since it uses as much as digits as its factorization.

25316887213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The spelling of 25316887213 in words is "twenty-five billion, three hundred sixteen million, eight hundred eighty-seven thousand, two hundred thirteen".