31240340230013 has 2 divisors, whose sum is σ = 31240340230014. Its totient is φ = 31240340230012.

The previous prime is 31240340230009. The next prime is 31240340230037. The reversal of 31240340230013 is 31003204304213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28787066468164 + 2453273761849 = 5365358^2 + 1566293^2 .

It is a cyclic number.

It is not a de Polignac number, because 31240340230013 - 2² = 31240340230009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240340230093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620170115006 + 15620170115007.

It is an arithmetic number, because the mean of its divisors is an integer number (15620170115007).

Almost surely, 2^{31240340230013} is an apocalyptic number.

It is an amenable number.

31240340230013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240340230013 is an equidigital number, since it uses as much as digits as its factorization.

31240340230013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31240340230013 its reverse (31003204304213), we get a palindrome (62243544534226).

The spelling of 31240340230013 in words is "thirty-one trillion, two hundred forty billion, three hundred forty million, two hundred thirty thousand, thirteen".