31020311323 has 2 divisors, whose sum is σ = 31020311324. Its totient is φ = 31020311322.

The previous prime is 31020311279. The next prime is 31020311339. The reversal of 31020311323 is 32311302013.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020311323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31020311323.

It is not a weakly prime, because it can be changed into another prime (31020311123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510155661 + 15510155662.

It is an arithmetic number, because the mean of its divisors is an integer number (15510155662).

Almost surely, 2^31020311323 is an apocalyptic number.

31020311323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020311323 is an equidigital number, since it uses as much as digits as its factorization.

31020311323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31020311323 its reverse (32311302013), we get a palindrome (63331613336).

The spelling of 31020311323 in words is "thirty-one billion, twenty million, three hundred eleven thousand, three hundred twenty-three".