31312031144 has 16 divisors (see below), whose sum is σ = 60296817300. Its totient is φ = 15232879872.

The previous prime is 31312031137. The next prime is 31312031159. The reversal of 31312031144 is 44113021313.

It can be written as a sum of positive squares in 2 ways, for example, as 25265102500 + 6046928644 = 158950^2 + 77762^2 .

It is an unprimeable number.

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, 52891649 + ... + 52892240.

Almost surely, 2^31312031144 is an apocalyptic number.

It is an amenable number.

31312031144 is a deficient number, since it is larger than the sum of its proper divisors (28984786156).

31312031144 is a wasteful number, since it uses less digits than its factorization.

31312031144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105783932 (or 105783928 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31312031144 its reverse (44113021313), we get a palindrome (75425052457).

The spelling of 31312031144 in words is "thirty-one billion, three hundred twelve million, thirty-one thousand, one hundred forty-four".