231213222320 has 40 divisors (see below), whose sum is σ = 538736924880. Its totient is φ = 92284655360.

The previous prime is 231213222319. The next prime is 231213222397. The reversal of 231213222320 is 23222312132.

231213222320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3097790 + ... + 3171549.

It is an arithmetic number, because the mean of its divisors is an integer number (13468423122).

Almost surely, 2^231213222320 is an apocalyptic number.

231213222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231213222320 is an abundant number, since it is smaller than the sum of its proper divisors (307523702560).

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

231213222320 is a wasteful number, since it uses less digits than its factorization.

231213222320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269813 (or 6269807 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 231213222320 its reverse (23222312132), we get a palindrome (254435534452).

The spelling of 231213222320 in words is "two hundred thirty-one billion, two hundred thirteen million, two hundred twenty-two thousand, three hundred twenty".