311431032343403 has 64 divisors (see below), whose sum is σ = 379498297728000. Its totient is φ = 255250040209920.

The previous prime is 311431032343399. The next prime is 311431032343423. The reversal of 311431032343403 is 304343230134113.

It is a happy number.

It is not a de Polignac number, because 311431032343403 - 2² = 311431032343399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311431032343423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 208973525 + ... + 210458537.

It is an arithmetic number, because the mean of its divisors is an integer number (5929660902000).

Almost surely, 2^{311431032343403} is an apocalyptic number.

311431032343403 is a deficient number, since it is larger than the sum of its proper divisors (68067265384597).

311431032343403 is a wasteful number, since it uses less digits than its factorization.

311431032343403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485377 (or 1485363 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 311431032343403 its reverse (304343230134113), we get a palindrome (615774262477516).

The spelling of 311431032343403 in words is "three hundred eleven trillion, four hundred thirty-one billion, thirty-two million, three hundred forty-three thousand, four hundred three".