31390313012 has 12 divisors (see below), whose sum is σ = 54937326276. Its totient is φ = 15693934080.

The previous prime is 31390313011. The next prime is 31390313027. The reversal of 31390313012 is 21031309313.

It can be written as a sum of positive squares in 2 ways, for example, as 8099280016 + 23291032996 = 89996^2 + 152614^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31390313011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246563 + ... + 351530.

It is an arithmetic number, because the mean of its divisors is an integer number (4578110523).

Almost surely, 2^31390313012 is an apocalyptic number.

It is an amenable number.

31390313012 is a deficient number, since it is larger than the sum of its proper divisors (23547013264).

31390313012 is a wasteful number, since it uses less digits than its factorization.

31390313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611218 (or 611216 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 31390313012 in words is "thirty-one billion, three hundred ninety million, three hundred thirteen thousand, twelve".