2531137120717 has 2 divisors, whose sum is σ = 2531137120718. Its totient is φ = 2531137120716.

The previous prime is 2531137120711. The next prime is 2531137120843. The reversal of 2531137120717 is 7170217311352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1788815301156 + 742321819561 = 1337466^2 + 861581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531137120717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2531137120717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2531137120711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265568560358 + 1265568560359.

It is an arithmetic number, because the mean of its divisors is an integer number (1265568560359).

Almost surely, 2^{2531137120717} is an apocalyptic number.

It is an amenable number.

2531137120717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531137120717 is an equidigital number, since it uses as much as digits as its factorization.

2531137120717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 40.

The spelling of 2531137120717 in words is "two trillion, five hundred thirty-one billion, one hundred thirty-seven million, one hundred twenty thousand, seven hundred seventeen".