231320004 has 48 divisors (see below), whose sum is σ = 561102528. Its totient is φ = 74107008.

The previous prime is 231319987. The next prime is 231320009. The reversal of 231320004 is 400023132.

231320004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231320009) 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, 33714 + ... + 39990.

It is an arithmetic number, because the mean of its divisors is an integer number (11689636).

Almost surely, 2^231320004 is an apocalyptic number.

It is an amenable number.

231320004 is an abundant number, since it is smaller than the sum of its proper divisors (329782524).

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

231320004 is a wasteful number, since it uses less digits than its factorization.

231320004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404 (or 6402 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 231320004 is about 15209.2078689194. The cubic root of 231320004 is about 613.8624434111.

Adding to 231320004 its reverse (400023132), we get a palindrome (631343136).

The spelling of 231320004 in words is "two hundred thirty-one million, three hundred twenty thousand, four".