231143525012 has 12 divisors (see below), whose sum is σ = 407686218240. Its totient is φ = 114661748376.

The previous prime is 231143525009. The next prime is 231143525141. The reversal of 231143525012 is 210525341132.

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, 227502962 + ... + 227503977.

It is an arithmetic number, because the mean of its divisors is an integer number (33973851520).

Almost surely, 2^231143525012 is an apocalyptic number.

It is an amenable number.

231143525012 is a deficient number, since it is larger than the sum of its proper divisors (176542693228).

231143525012 is a wasteful number, since it uses less digits than its factorization.

231143525012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455007070 (or 455007068 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 231143525012 its reverse (210525341132), we get a palindrome (441668866144).

The spelling of 231143525012 in words is "two hundred thirty-one billion, one hundred forty-three million, five hundred twenty-five thousand, twelve".