31322331012 has 48 divisors (see below), whose sum is σ = 83567877120. Its totient is φ = 8944773792.

The previous prime is 31322330899. The next prime is 31322331023. The reversal of 31322331012 is 21013322313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31322331012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78289 + ... + 262247.

It is an arithmetic number, because the mean of its divisors is an integer number (1740997440).

Almost surely, 2^31322331012 is an apocalyptic number.

It is an amenable number.

31322331012 is an abundant number, since it is smaller than the sum of its proper divisors (52245546108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31322331012 is a wasteful number, since it uses less digits than its factorization.

31322331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186000 (or 185998 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31322331012 its reverse (21013322313), we get a palindrome (52335653325).

The spelling of 31322331012 in words is "thirty-one billion, three hundred twenty-two million, three hundred thirty-one thousand, twelve".