231043212 has 48 divisors (see below), whose sum is σ = 601574400. Its totient is φ = 76683600.

The previous prime is 231043193. The next prime is 231043283. The reversal of 231043212 is 212340132.

231043212 is a `hidden beast` number, since 231 + 0 + 432 + 1 + 2 = 666.

It is a super-2 number, since 2×231043212² = 106761931622553888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21337 + ... + 30287.

It is an arithmetic number, because the mean of its divisors is an integer number (12532800).

Almost surely, 2^231043212 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 231043212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300787200).

231043212 is an abundant number, since it is smaller than the sum of its proper divisors (370531188).

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

231043212 is a wasteful number, since it uses less digits than its factorization.

231043212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9203 (or 9195 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231043212 is about 15200.1056575275. The cubic root of 231043212 is about 613.6175013012.

Adding to 231043212 its reverse (212340132), we get a palindrome (443383344).

The spelling of 231043212 in words is "two hundred thirty-one million, forty-three thousand, two hundred twelve".