31330440212 has 12 divisors (see below), whose sum is σ = 55057679040. Its totient is φ = 15599674776.

The previous prime is 31330440137. The next prime is 31330440233. The reversal of 31330440212 is 21204403313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16385258 + ... + 16387169.

It is an arithmetic number, because the mean of its divisors is an integer number (4588139920).

Almost surely, 2^31330440212 is an apocalyptic number.

It is an amenable number.

31330440212 is a deficient number, since it is larger than the sum of its proper divisors (23727238828).

31330440212 is a wasteful number, since it uses less digits than its factorization.

31330440212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32772670 (or 32772668 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31330440212 its reverse (21204403313), we get a palindrome (52534843525).

The spelling of 31330440212 in words is "thirty-one billion, three hundred thirty million, four hundred forty thousand, two hundred twelve".