231888216 has 64 divisors (see below), whose sum is σ = 664519680. Its totient is φ = 66055680.

The previous prime is 231888203. The next prime is 231888227. The reversal of 231888216 is 612888132.

231888216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59776 + ... + 63536.

It is an arithmetic number, because the mean of its divisors is an integer number (10383120).

Almost surely, 2^231888216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231888216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332259840).

231888216 is an abundant number, since it is smaller than the sum of its proper divisors (432631464).

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

231888216 is a wasteful number, since it uses less digits than its factorization.

231888216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4140 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 231888216 is about 15227.8762800333. The cubic root of 231888216 is about 614.3646608160.

The spelling of 231888216 in words is "two hundred thirty-one million, eight hundred eighty-eight thousand, two hundred sixteen".