31312331012 has 6 divisors (see below), whose sum is σ = 54796579278. Its totient is φ = 15656165504.

The previous prime is 31312330997. The next prime is 31312331033. The reversal of 31312331012 is 21013321313.

It can be written as a sum of positive squares in only one way, i.e., 31306348096 + 5982916 = 176936^2 + 2446^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3914041373 + ... + 3914041380.

It is an arithmetic number, because the mean of its divisors is an integer number (9132763213).

Almost surely, 2^31312331012 is an apocalyptic number.

It is an amenable number.

31312331012 is a deficient number, since it is larger than the sum of its proper divisors (23484248266).

31312331012 is a wasteful number, since it uses less digits than its factorization.

31312331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7828082757 (or 7828082755 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31312331012 its reverse (21013321313), we get a palindrome (52325652325).

The spelling of 31312331012 in words is "thirty-one billion, three hundred twelve million, three hundred thirty-one thousand, twelve".