31320333231013 has 2 divisors, whose sum is σ = 31320333231014. Its totient is φ = 31320333231012.

The previous prime is 31320333231007. The next prime is 31320333231029. The reversal of 31320333231013 is 31013233302313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892747720324 + 13427585510689 = 4229982^2 + 3664367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320333231013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320333231053) 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, 15660166615506 + 15660166615507.

It is an arithmetic number, because the mean of its divisors is an integer number (15660166615507).

Almost surely, 2^{31320333231013} is an apocalyptic number.

It is an amenable number.

31320333231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320333231013 is an equidigital number, since it uses as much as digits as its factorization.

31320333231013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 31320333231013 its reverse (31013233302313), we get a palindrome (62333566533326).

It can be divided in two parts, 31320 and 333231013, that added together give a palindrome (333262333).

The spelling of 31320333231013 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty-three million, two hundred thirty-one thousand, thirteen".