231023312 has 40 divisors (see below), whose sum is σ = 483109704. Its totient is φ = 106389504.

The previous prime is 231023297. The next prime is 231023341. The reversal of 231023312 is 213320132.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 230310976 = 844^2 + 15176^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122408 + ... + 124280.

Almost surely, 2^231023312 is an apocalyptic number.

It is an amenable number.

231023312 is an abundant number, since it is smaller than the sum of its proper divisors (252086392).

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

231023312 is a wasteful number, since it uses less digits than its factorization.

231023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2481 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231023312 is about 15199.4510427186. The cubic root of 231023312 is about 613.5998836173.

Adding to 231023312 its reverse (213320132), we get a palindrome (444343444).

The spelling of 231023312 in words is "two hundred thirty-one million, twenty-three thousand, three hundred twelve".