311323320123031 has 4 divisors (see below), whose sum is σ = 311326240135864. Its totient is φ = 311320400110200.

The previous prime is 311323320123019. The next prime is 311323320123037. The reversal of 311323320123031 is 130321023323113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311323320123031 - 2²¹ = 311323318025879 is a prime.

It is a super-2 number, since 2×311323320123031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311323320123037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459846485 + ... + 1460059726.

It is an arithmetic number, because the mean of its divisors is an integer number (77831560033966).

Almost surely, 2^{311323320123031} is an apocalyptic number.

311323320123031 is a deficient number, since it is larger than the sum of its proper divisors (2920012833).

311323320123031 is a wasteful number, since it uses less digits than its factorization.

311323320123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920012832.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 311323320123031 its reverse (130321023323113), we get a palindrome (441644343446144).

The spelling of 311323320123031 in words is "three hundred eleven trillion, three hundred twenty-three billion, three hundred twenty million, one hundred twenty-three thousand, thirty-one".