31320313012 has 6 divisors (see below), whose sum is σ = 54810547778. Its totient is φ = 15660156504.

The previous prime is 31320312983. The next prime is 31320313067. The reversal of 31320313012 is 21031302313.

It can be written as a sum of positive squares in only one way, i.e., 25336362276 + 5983950736 = 159174^2 + 77356^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915039123 + ... + 3915039130.

Almost surely, 2^31320313012 is an apocalyptic number.

It is an amenable number.

31320313012 is a deficient number, since it is larger than the sum of its proper divisors (23490234766).

31320313012 is a wasteful number, since it uses less digits than its factorization.

31320313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830078257 (or 7830078255 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31320313012 its reverse (21031302313), we get a palindrome (52351615325).

The spelling of 31320313012 in words is "thirty-one billion, three hundred twenty million, three hundred thirteen thousand, twelve".