231563312 has 10 divisors (see below), whose sum is σ = 448653948. Its totient is φ = 115781648.

The previous prime is 231563309. The next prime is 231563327. The reversal of 231563312 is 213365132.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7236338 + ... + 7236369.

Almost surely, 2^231563312 is an apocalyptic number.

It is an amenable number.

231563312 is a deficient number, since it is larger than the sum of its proper divisors (217090636).

231563312 is a wasteful number, since it uses less digits than its factorization.

231563312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472715 (or 14472709 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 231563312 is about 15217.2044738842. The cubic root of 231563312 is about 614.0775931393.

The spelling of 231563312 in words is "two hundred thirty-one million, five hundred sixty-three thousand, three hundred twelve".