31203320310013 has 2 divisors, whose sum is σ = 31203320310014. Its totient is φ = 31203320310012.

The previous prime is 31203320309989. The next prime is 31203320310103. The reversal of 31203320310013 is 31001302330213.

Together with next prime (31203320310103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29447955000409 + 1755365309604 = 5426597^2 + 1324902^2 .

It is a cyclic number.

It is not a de Polignac number, because 31203320310013 - 2⁵ = 31203320309981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31203320316013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601660155006 + 15601660155007.

It is an arithmetic number, because the mean of its divisors is an integer number (15601660155007).

Almost surely, 2^{31203320310013} is an apocalyptic number.

It is an amenable number.

31203320310013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203320310013 is an equidigital number, since it uses as much as digits as its factorization.

31203320310013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31203320310013 its reverse (31001302330213), we get a palindrome (62204622640226).

The spelling of 31203320310013 in words is "thirty-one trillion, two hundred three billion, three hundred twenty million, three hundred ten thousand, thirteen".