311431313422 has 4 divisors (see below), whose sum is σ = 467146970136. Its totient is φ = 155715656710.

The previous prime is 311431313411. The next prime is 311431313429. The reversal of 311431313422 is 224313134113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224313134113 = 19 ⋅11805954427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311431313429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77857828354 + ... + 77857828357.

It is an arithmetic number, because the mean of its divisors is an integer number (116786742534).

Almost surely, 2^311431313422 is an apocalyptic number.

311431313422 is a deficient number, since it is larger than the sum of its proper divisors (155715656714).

311431313422 is a wasteful number, since it uses less digits than its factorization.

311431313422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155715656713.

The product of its digits is 5184, while the sum is 28.

Adding to 311431313422 its reverse (224313134113), we get a palindrome (535744447535).

The spelling of 311431313422 in words is "three hundred eleven billion, four hundred thirty-one million, three hundred thirteen thousand, four hundred twenty-two".