231228186 has 64 divisors (see below), whose sum is σ = 568892160. Its totient is φ = 61148160.

The previous prime is 231228161. The next prime is 231228199. The reversal of 231228186 is 681822132.

231228186 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40900 + ... + 46208.

It is an arithmetic number, because the mean of its divisors is an integer number (8888940).

Almost surely, 2^231228186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231228186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284446080).

231228186 is an abundant number, since it is smaller than the sum of its proper divisors (337663974).

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

231228186 is a wasteful number, since it uses less digits than its factorization.

231228186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399.

The product of its digits is 9216, while the sum is 33.

The square root of 231228186 is about 15206.1890689285. The cubic root of 231228186 is about 613.7812123892.

The spelling of 231228186 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, one hundred eighty-six".