231333221232 has 60 divisors (see below), whose sum is σ = 647811767304. Its totient is φ = 77063425920.

The previous prime is 231333221209. The next prime is 231333221237. The reversal of 231333221232 is 232122333132.

231333221232 is a `hidden beast` number, since 2 + 313 + 3 + 322 + 1 + 23 + 2 = 666.

231333221232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 231333221196 and 231333221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231333221237) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 262098 + ... + 728945.

Almost surely, 2^231333221232 is an apocalyptic number.

It is an amenable number.

231333221232 is an abundant number, since it is smaller than the sum of its proper divisors (416478546072).

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

231333221232 is a wasteful number, since it uses less digits than its factorization.

231333221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992678 (or 992669 counting only the distinct ones).

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

Adding to 231333221232 its reverse (232122333132), we get a palindrome (463455554364).

The spelling of 231333221232 in words is "two hundred thirty-one billion, three hundred thirty-three million, two hundred twenty-one thousand, two hundred thirty-two".