31131442024 has 16 divisors (see below), whose sum is σ = 59795148420. Its totient is φ = 15186069120.

The previous prime is 31131442021. The next prime is 31131442033. The reversal of 31131442024 is 42024413113.

It can be written as a sum of positive squares in 2 ways, for example, as 29663172900 + 1468269124 = 172230^2 + 38318^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31131442024.

It is not an unprimeable number, because it can be changed into a prime (31131442021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47456139 + ... + 47456794.

Almost surely, 2^31131442024 is an apocalyptic number.

It is an amenable number.

31131442024 is a deficient number, since it is larger than the sum of its proper divisors (28663706396).

31131442024 is a wasteful number, since it uses less digits than its factorization.

31131442024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94912980 (or 94912976 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31131442024 its reverse (42024413113), we get a palindrome (73155855137).

The spelling of 31131442024 in words is "thirty-one billion, one hundred thirty-one million, four hundred forty-two thousand, twenty-four".