31013233222813 has 2 divisors, whose sum is σ = 31013233222814. Its totient is φ = 31013233222812.

The previous prime is 31013233222793. The next prime is 31013233222919. The reversal of 31013233222813 is 31822233231013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25300879880004 + 5712353342809 = 5029998^2 + 2390053^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013233222813 - 2²¹ = 31013231125661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013233226813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506616611406 + 15506616611407.

It is an arithmetic number, because the mean of its divisors is an integer number (15506616611407).

Almost surely, 2^{31013233222813} is an apocalyptic number.

It is an amenable number.

31013233222813 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013233222813 is an equidigital number, since it uses as much as digits as its factorization.

31013233222813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 31013233222813 its reverse (31822233231013), we get a palindrome (62835466453826).

The spelling of 31013233222813 in words is "thirty-one trillion, thirteen billion, two hundred thirty-three million, two hundred twenty-two thousand, eight hundred thirteen".