31131443344 has 40 divisors (see below), whose sum is σ = 61340752512. Its totient is φ = 15302949120.

The previous prime is 31131443333. The next prime is 31131443351. The reversal of 31131443344 is 44334413113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320397 + ... + 406099.

Almost surely, 2^31131443344 is an apocalyptic number.

It is an amenable number.

31131443344 is a deficient number, since it is larger than the sum of its proper divisors (30209309168).

31131443344 is a wasteful number, since it uses less digits than its factorization.

31131443344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86095 (or 86089 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

Adding to 31131443344 its reverse (44334413113), we get a palindrome (75465856457).

The spelling of 31131443344 in words is "thirty-one billion, one hundred thirty-one million, four hundred forty-three thousand, three hundred forty-four".