231813818233212 has 96 divisors (see below), whose sum is σ = 546946678801152. Its totient is φ = 76413096055296.

The previous prime is 231813818233211. The next prime is 231813818233289. The reversal of 231813818233212 is 212332818318132.

231813818233212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231813818233211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321006208 + ... + 321727544.

It is an arithmetic number, because the mean of its divisors is an integer number (5697361237512).

Almost surely, 2^{231813818233212} is an apocalyptic number.

It is an amenable number.

231813818233212 is an abundant number, since it is smaller than the sum of its proper divisors (315132860567940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231813818233212 is a wasteful number, since it uses less digits than its factorization.

231813818233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722347 (or 722345 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The spelling of 231813818233212 in words is "two hundred thirty-one trillion, eight hundred thirteen billion, eight hundred eighteen million, two hundred thirty-three thousand, two hundred twelve".