231320330 has 16 divisors (see below), whose sum is σ = 416663784. Its totient is φ = 92464320.

The previous prime is 231320329. The next prime is 231320333. The reversal of 231320330 is 33023132.

231320330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 128845201 + 102475129 = 11351^2 + 10123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231320299 and 231320308.

It is not an unprimeable number, because it can be changed into a prime (231320333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8960 + ... + 23300.

Almost surely, 2^231320330 is an apocalyptic number.

231320330 is a deficient number, since it is larger than the sum of its proper divisors (185343454).

231320330 is a wasteful number, since it uses less digits than its factorization.

231320330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15961.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 231320330 is about 15209.2185861076. The cubic root of 231320330 is about 613.8627317837.

Adding to 231320330 its reverse (33023132), we get a palindrome (264343462).

The spelling of 231320330 in words is "two hundred thirty-one million, three hundred twenty thousand, three hundred thirty".