231143043212 has 24 divisors (see below), whose sum is σ = 415920019536. Its totient is φ = 112316079168.

The previous prime is 231143043203. The next prime is 231143043223. The reversal of 231143043212 is 212340341132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789218 + ... + 1041705.

It is an arithmetic number, because the mean of its divisors is an integer number (17330000814).

Almost surely, 2^231143043212 is an apocalyptic number.

It is an amenable number.

231143043212 is a deficient number, since it is larger than the sum of its proper divisors (184776976324).

231143043212 is a wasteful number, since it uses less digits than its factorization.

231143043212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831817 (or 1831815 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231143043212 its reverse (212340341132), we get a palindrome (443483384344).

The spelling of 231143043212 in words is "two hundred thirty-one billion, one hundred forty-three million, forty-three thousand, two hundred twelve".