231711328 has 24 divisors (see below), whose sum is σ = 460373760. Its totient is φ = 114791040.

The previous prime is 231711323. The next prime is 231711371. The reversal of 231711328 is 823117132.

231711328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231711296 and 231711305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231711323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29728 + ... + 36703.

It is an arithmetic number, because the mean of its divisors is an integer number (19182240).

Almost surely, 2^231711328 is an apocalyptic number.

It is an amenable number.

231711328 is a deficient number, since it is larger than the sum of its proper divisors (228662432).

231711328 is a wasteful number, since it uses less digits than its factorization.

231711328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66550 (or 66542 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 231711328 is about 15222.0671395182. The cubic root of 231711328 is about 614.2084053834.

The spelling of 231711328 in words is "two hundred thirty-one million, seven hundred eleven thousand, three hundred twenty-eight".