231303320 has 32 divisors (see below), whose sum is σ = 522007200. Its totient is φ = 92241408.

The previous prime is 231303301. The next prime is 231303323. The reversal of 231303320 is 23303132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231303323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4901 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (16312725).

Almost surely, 2^231303320 is an apocalyptic number.

231303320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231303320 is an abundant number, since it is smaller than the sum of its proper divisors (290703880).

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

231303320 is a wasteful number, since it uses less digits than its factorization.

231303320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17507 (or 17503 counting only the distinct ones).

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

The square root of 231303320 is about 15208.6593755005. The cubic root of 231303320 is about 613.8476847405.

Adding to 231303320 its reverse (23303132), we get a palindrome (254606452).

The spelling of 231303320 in words is "two hundred thirty-one million, three hundred three thousand, three hundred twenty".