231020231320 has 16 divisors (see below), whose sum is σ = 519795520560. Its totient is φ = 92408092512.

The previous prime is 231020231311. The next prime is 231020231347. The reversal of 231020231320 is 23132020132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887752852 + ... + 2887752931.

It is an arithmetic number, because the mean of its divisors is an integer number (32487220035).

Almost surely, 2^231020231320 is an apocalyptic number.

231020231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231020231320 is an abundant number, since it is smaller than the sum of its proper divisors (288775289240).

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

231020231320 is a wasteful number, since it uses less digits than its factorization.

231020231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775505794 (or 5775505790 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 231020231320 its reverse (23132020132), we get a palindrome (254152251452).

The spelling of 231020231320 in words is "two hundred thirty-one billion, twenty million, two hundred thirty-one thousand, three hundred twenty".