231213433320 has 96 divisors (see below), whose sum is σ = 751505040000. Its totient is φ = 61651879296.

The previous prime is 231213433279. The next prime is 231213433369. The reversal of 231213433320 is 23334312132.

231213433320 is a `hidden beast` number, since 2 + 312 + 1 + 343 + 3 + 3 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6990181 + ... + 7023179.

It is an arithmetic number, because the mean of its divisors is an integer number (7828177500).

Almost surely, 2^231213433320 is an apocalyptic number.

231213433320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231213433320 is an abundant number, since it is smaller than the sum of its proper divisors (520291606680).

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

231213433320 is a wasteful number, since it uses less digits than its factorization.

231213433320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52479 (or 52472 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 231213433320 its reverse (23334312132), we get a palindrome (254547745452).

The spelling of 231213433320 in words is "two hundred thirty-one billion, two hundred thirteen million, four hundred thirty-three thousand, three hundred twenty".