231643212435 has 24 divisors (see below), whose sum is σ = 405654238080. Its totient is φ = 122269404672.

The previous prime is 231643212377. The next prime is 231643212439. The reversal of 231643212435 is 534212346132.

231643212435 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 4 + 3 + 212 + 435 = 666.

It is not a de Polignac number, because 231643212435 - 2²⁰ = 231642163859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231643212435.

It is not an unprimeable number, because it can be changed into a prime (231643212439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26529795 + ... + 26538524.

It is an arithmetic number, because the mean of its divisors is an integer number (16902259920).

Almost surely, 2^231643212435 is an apocalyptic number.

231643212435 is a deficient number, since it is larger than the sum of its proper divisors (174011025645).

231643212435 is a wasteful number, since it uses less digits than its factorization.

231643212435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53068427 (or 53068424 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 231643212435 its reverse (534212346132), we get a palindrome (765855558567).

The spelling of 231643212435 in words is "two hundred thirty-one billion, six hundred forty-three million, two hundred twelve thousand, four hundred thirty-five".