231333012 has 18 divisors (see below), whose sum is σ = 584758538. Its totient is φ = 77110992.

The previous prime is 231333001. The next prime is 231333043. The reversal of 231333012 is 210333132.

It can be written as a sum of positive squares in only one way, i.e., 231161616 + 171396 = 15204^2 + 414^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3212923 + ... + 3212994.

Almost surely, 2^231333012 is an apocalyptic number.

It is an amenable number.

231333012 is an abundant number, since it is smaller than the sum of its proper divisors (353425526).

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

231333012 is a wasteful number, since it uses less digits than its factorization.

231333012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425927 (or 6425922 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231333012 is about 15209.6354985910. The cubic root of 231333012 is about 613.8739497989.

Adding to 231333012 its reverse (210333132), we get a palindrome (441666144).

The spelling of 231333012 in words is "two hundred thirty-one million, three hundred thirty-three thousand, twelve".