231320212 has 12 divisors (see below), whose sum is σ = 426116320. Its totient is φ = 109572696.

The previous prime is 231320191. The next prime is 231320227. The reversal of 231320212 is 212023132.

231320212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521768 + ... + 1521919.

Almost surely, 2^231320212 is an apocalyptic number.

It is an amenable number.

231320212 is a deficient number, since it is larger than the sum of its proper divisors (194796108).

231320212 is a wasteful number, since it uses less digits than its factorization.

231320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043710 (or 3043708 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231320212 is about 15209.2147068808. The cubic root of 231320212 is about 613.8626274035.

Adding to 231320212 its reverse (212023132), we get a palindrome (443343344).

The spelling of 231320212 in words is "two hundred thirty-one million, three hundred twenty thousand, two hundred twelve".