31311023323 has 2 divisors, whose sum is σ = 31311023324. Its totient is φ = 31311023322.

The previous prime is 31311023287. The next prime is 31311023327. The reversal of 31311023323 is 32332011313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31311023323 - 2²⁵ = 31277468891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311023294 and 31311023303.

It is not a weakly prime, because it can be changed into another prime (31311023327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655511661 + 15655511662.

It is an arithmetic number, because the mean of its divisors is an integer number (15655511662).

Almost surely, 2^31311023323 is an apocalyptic number.

31311023323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311023323 is an equidigital number, since it uses as much as digits as its factorization.

31311023323 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 31311023323 its reverse (32332011313), we get a palindrome (63643034636).

The spelling of 31311023323 in words is "thirty-one billion, three hundred eleven million, twenty-three thousand, three hundred twenty-three".