231242312 has 32 divisors (see below), whose sum is σ = 521601600. Its totient is φ = 93887424.

The previous prime is 231242309. The next prime is 231242357. The reversal of 231242312 is 213242132.

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 7 ways as a sum of consecutive naturals, for example, 107603 + ... + 109730.

It is an arithmetic number, because the mean of its divisors is an integer number (16300050).

Almost surely, 2^231242312 is an apocalyptic number.

It is an amenable number.

231242312 is an abundant number, since it is smaller than the sum of its proper divisors (290359288).

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

231242312 is a wasteful number, since it uses less digits than its factorization.

231242312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217365 (or 217361 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 231242312 is about 15206.6535437617. The cubic root of 231242312 is about 613.7937110051.

Adding to 231242312 its reverse (213242132), we get a palindrome (444484444).

The spelling of 231242312 in words is "two hundred thirty-one million, two hundred forty-two thousand, three hundred twelve".