31143000212 has 12 divisors (see below), whose sum is σ = 54516576576. Its totient is φ = 15566835480.

The previous prime is 31143000191. The next prime is 31143000223. The reversal of 31143000212 is 21200034113.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1151114 + ... + 1177857.

It is an arithmetic number, because the mean of its divisors is an integer number (4543048048).

Almost surely, 2^31143000212 is an apocalyptic number.

It is an amenable number.

31143000212 is a deficient number, since it is larger than the sum of its proper divisors (23373576364).

31143000212 is a wasteful number, since it uses less digits than its factorization.

31143000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332318 (or 2332316 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31143000212 its reverse (21200034113), we get a palindrome (52343034325).

The spelling of 31143000212 in words is "thirty-one billion, one hundred forty-three million, two hundred twelve", and thus it is an aban number.