31303310212 has 24 divisors (see below), whose sum is σ = 55117238400. Its totient is φ = 15555625056.

The previous prime is 31303310197. The next prime is 31303310221. The reversal of 31303310212 is 21201330313.

It is a self number, because there is not a number n which added to its sum of digits gives 31303310212.

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 in 7 ways as a sum of consecutive naturals, for example, 1401589 + ... + 1423747.

It is an arithmetic number, because the mean of its divisors is an integer number (2296551600).

Almost surely, 2^31303310212 is an apocalyptic number.

It is an amenable number.

31303310212 is a deficient number, since it is larger than the sum of its proper divisors (23813928188).

31303310212 is a wasteful number, since it uses less digits than its factorization.

31303310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24315 (or 24313 counting only the distinct ones).

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

Adding to 31303310212 its reverse (21201330313), we get a palindrome (52504640525).

The spelling of 31303310212 in words is "thirty-one billion, three hundred three million, three hundred ten thousand, two hundred twelve".