231320828 has 12 divisors (see below), whose sum is σ = 411673080. Its totient is φ = 113699952.

The previous prime is 231320827. The next prime is 231320833. The reversal of 231320828 is 828023132.

231320828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231320828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231320827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489851 + ... + 490322.

It is an arithmetic number, because the mean of its divisors is an integer number (34306090).

Almost surely, 2^231320828 is an apocalyptic number.

It is an amenable number.

231320828 is a deficient number, since it is larger than the sum of its proper divisors (180352252).

231320828 is a wasteful number, since it uses less digits than its factorization.

231320828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980236 (or 980234 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 231320828 is about 15209.2349577485. The cubic root of 231320828 is about 613.8631723033.

The spelling of 231320828 in words is "two hundred thirty-one million, three hundred twenty thousand, eight hundred twenty-eight".