31056721144 has 16 divisors (see below), whose sum is σ = 58233352320. Its totient is φ = 15527827200.

The previous prime is 31056721121. The next prime is 31056721159. The reversal of 31056721144 is 44112765013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298344 + ... + 388744.

It is an arithmetic number, because the mean of its divisors is an integer number (3639584520).

Almost surely, 2^31056721144 is an apocalyptic number.

It is an amenable number.

31056721144 is a deficient number, since it is larger than the sum of its proper divisors (27176631176).

31056721144 is a wasteful number, since it uses less digits than its factorization.

31056721144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133350 (or 133346 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 31056721144 in words is "thirty-one billion, fifty-six million, seven hundred twenty-one thousand, one hundred forty-four".