31313230023133 has 2 divisors, whose sum is σ = 31313230023134. Its totient is φ = 31313230023132.

The previous prime is 31313230023107. The next prime is 31313230023139. The reversal of 31313230023133 is 33132003231313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24515540034489 + 6797689988644 = 4951317^2 + 2607238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313230023133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313230023139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656615011566 + 15656615011567.

It is an arithmetic number, because the mean of its divisors is an integer number (15656615011567).

Almost surely, 2^{31313230023133} is an apocalyptic number.

It is an amenable number.

31313230023133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313230023133 is an equidigital number, since it uses as much as digits as its factorization.

31313230023133 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 31313230023133 its reverse (33132003231313), we get a palindrome (64445233254446).

The spelling of 31313230023133 in words is "thirty-one trillion, three hundred thirteen billion, two hundred thirty million, twenty-three thousand, one hundred thirty-three".