31581364244 has 12 divisors (see below), whose sum is σ = 56024475444. Its totient is φ = 15574371264.

The previous prime is 31581364223. The next prime is 31581364271. The reversal of 31581364244 is 44246318513.

It can be written as a sum of positive squares in 2 ways, for example, as 20294851600 + 11286512644 = 142460^2 + 106238^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54077387 + ... + 54077970.

It is an arithmetic number, because the mean of its divisors is an integer number (4668706287).

Almost surely, 2^31581364244 is an apocalyptic number.

It is an amenable number.

31581364244 is a deficient number, since it is larger than the sum of its proper divisors (24443111200).

31581364244 is a wasteful number, since it uses less digits than its factorization.

31581364244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108155434 (or 108155432 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The spelling of 31581364244 in words is "thirty-one billion, five hundred eighty-one million, three hundred sixty-four thousand, two hundred forty-four".