231213032312 has 8 divisors (see below), whose sum is σ = 433524435600. Its totient is φ = 115606516152.

The previous prime is 231213032311. The next prime is 231213032317. The reversal of 231213032312 is 213230312132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231213032311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14450814512 + ... + 14450814527.

It is an arithmetic number, because the mean of its divisors is an integer number (54190554450).

Almost surely, 2^231213032312 is an apocalyptic number.

It is an amenable number.

231213032312 is a deficient number, since it is larger than the sum of its proper divisors (202311403288).

231213032312 is a wasteful number, since it uses less digits than its factorization.

231213032312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28901629045 (or 28901629041 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231213032312 its reverse (213230312132), we get a palindrome (444443344444).

The spelling of 231213032312 in words is "two hundred thirty-one billion, two hundred thirteen million, thirty-two thousand, three hundred twelve".