231324012 has 120 divisors (see below), whose sum is σ = 649479600. Its totient is φ = 71570304.

The previous prime is 231323971. The next prime is 231324013. The reversal of 231324012 is 210423132.

231324012 is a `hidden beast` number, since 231 + 32 + 401 + 2 = 666.

It is a super-2 number, since 2×231324012² = 107021597055552288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (231324013) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 325914 + ... + 326622.

It is an arithmetic number, because the mean of its divisors is an integer number (5412330).

Almost surely, 2^231324012 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 231324012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324739800).

231324012 is an abundant number, since it is smaller than the sum of its proper divisors (418155588).

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

231324012 is a wasteful number, since it uses less digits than its factorization.

231324012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 786 counting only the distinct ones).

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

The square root of 231324012 is about 15209.3396306349. The cubic root of 231324012 is about 613.8659887832.

Adding to 231324012 its reverse (210423132), we get a palindrome (441747144).

The spelling of 231324012 in words is "two hundred thirty-one million, three hundred twenty-four thousand, twelve".