231313202320 has 80 divisors (see below), whose sum is σ = 569651218560. Its totient is φ = 87050115072.

The previous prime is 231313202221. The next prime is 231313202321. The reversal of 231313202320 is 23202313132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 231313202291 and 231313202300.

It is not an unprimeable number, because it can be changed into a prime (231313202321) 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, 3781741 + ... + 3842419.

It is an arithmetic number, because the mean of its divisors is an integer number (7120640232).

Almost surely, 2^231313202320 is an apocalyptic number.

231313202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231313202320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284825609280).

231313202320 is an abundant number, since it is smaller than the sum of its proper divisors (338338016240).

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

231313202320 is a wasteful number, since it uses less digits than its factorization.

231313202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63512 (or 63506 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 231313202320 its reverse (23202313132), we get a palindrome (254515515452).

The spelling of 231313202320 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred two thousand, three hundred twenty".