231320804 has 48 divisors (see below), whose sum is σ = 477597120. Its totient is φ = 96647040.

The previous prime is 231320797. The next prime is 231320807. The reversal of 231320804 is 408023132.

It is a self number, because there is not a number n which added to its sum of digits gives 231320804.

It is not an unprimeable number, because it can be changed into a prime (231320807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161162 + ... + 162590.

It is an arithmetic number, because the mean of its divisors is an integer number (9949940).

Almost surely, 2^231320804 is an apocalyptic number.

It is an amenable number.

231320804 is an abundant number, since it is smaller than the sum of its proper divisors (246276316).

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

231320804 is a wasteful number, since it uses less digits than its factorization.

231320804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 231320804 is about 15209.2341687542. The cubic root of 231320804 is about 613.8631510735.

Adding to 231320804 its reverse (408023132), we get a palindrome (639343936).

The spelling of 231320804 in words is "two hundred thirty-one million, three hundred twenty thousand, eight hundred four".