3131021323 has 2 divisors, whose sum is σ = 3131021324. Its totient is φ = 3131021322.

The previous prime is 3131021321. The next prime is 3131021329. The reversal of 3131021323 is 3231201313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131021323 - 2¹ = 3131021321 is a prime.

Together with 3131021321, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3131021323.

It is not a weakly prime, because it can be changed into another prime (3131021321) 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, 1565510661 + 1565510662.

It is an arithmetic number, because the mean of its divisors is an integer number (1565510662).

Almost surely, 2^3131021323 is an apocalyptic number.

3131021323 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131021323 is an equidigital number, since it uses as much as digits as its factorization.

3131021323 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.

The square root of 3131021323 is about 55955.5298697099. The cubic root of 3131021323 is about 1462.9472775956.

Adding to 3131021323 its reverse (3231201313), we get a palindrome (6362222636).

The spelling of 3131021323 in words is "three billion, one hundred thirty-one million, twenty-one thousand, three hundred twenty-three".