231233436720 has 1920 divisors, whose sum is σ = 1042583270400. Its totient is φ = 46282752000.

The previous prime is 231233436677. The next prime is 231233436803. The reversal of 231233436720 is 27634332132.

231233436720 is a `hidden beast` number, since 2 + 312 + 334 + 3 + 6 + 7 + 2 + 0 = 666.

231233436720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 383 ways as a sum of consecutive naturals, for example, 5639839900 + ... + 5639839940.

It is an arithmetic number, because the mean of its divisors is an integer number (543012120).

Almost surely, 2^231233436720 is an apocalyptic number.

231233436720 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 231233436720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521291635200).

231233436720 is an abundant number, since it is smaller than the sum of its proper divisors (811349833680).

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

231233436720 is a wasteful number, since it uses less digits than its factorization.

231233436720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 36.

Adding to 231233436720 its reverse (27634332132), we get a palindrome (258867768852).

The spelling of 231233436720 in words is "two hundred thirty-one billion, two hundred thirty-three million, four hundred thirty-six thousand, seven hundred twenty".