3131423111440 has 40 divisors (see below), whose sum is σ = 7840601716248. Its totient is φ = 1156217763840.

The previous prime is 3131423111423. The next prime is 3131423111447. The reversal of 3131423111440 is 441113241313.

It can be written as a sum of positive squares in 4 ways, for example, as 159357446416 + 2972065665024 = 399196^2 + 1723968^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 3131423111399 and 3131423111408.

It is not an unprimeable number, because it can be changed into a prime (3131423111447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505490841 + ... + 1505492920.

Almost surely, 2^{3131423111440} is an apocalyptic number.

It is an amenable number.

3131423111440 is an abundant number, since it is smaller than the sum of its proper divisors (4709178604808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131423111440 is a wasteful number, since it uses less digits than its factorization.

3131423111440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010983787 (or 3010983781 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 3131423111440 its reverse (441113241313), we get a palindrome (3572536352753).

The spelling of 3131423111440 in words is "three trillion, one hundred thirty-one billion, four hundred twenty-three million, one hundred eleven thousand, four hundred forty".