311320343231 has 16 divisors (see below), whose sum is σ = 326763859968. Its totient is φ = 296037799200.

The previous prime is 311320343219. The next prime is 311320343287. The reversal of 311320343231 is 132343023113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311320343231 is a prime.

It is a super-2 number, since 2×311320343231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311320343231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311320348231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7169696 + ... + 7212986.

It is an arithmetic number, because the mean of its divisors is an integer number (20422741248).

Almost surely, 2^311320343231 is an apocalyptic number.

311320343231 is a deficient number, since it is larger than the sum of its proper divisors (15443516737).

311320343231 is a wasteful number, since it uses less digits than its factorization.

311320343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45142.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 311320343231 its reverse (132343023113), we get a palindrome (443663366344).

The spelling of 311320343231 in words is "three hundred eleven billion, three hundred twenty million, three hundred forty-three thousand, two hundred thirty-one".