231330143232 has 132 divisors (see below), whose sum is σ = 668230311216. Its totient is φ = 77078937600.

The previous prime is 231330143179. The next prime is 231330143237. The reversal of 231330143232 is 232341033132.

231330143232 is a `hidden beast` number, since 2 + 3 + 1 + 330 + 1 + 4 + 323 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 231330143196 and 231330143205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231330143237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39874732 + ... + 39880532.

Almost surely, 2^231330143232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231330143232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334115155608).

231330143232 is an abundant number, since it is smaller than the sum of its proper divisors (436900167984).

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

231330143232 is a wasteful number, since it uses less digits than its factorization.

231330143232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154 (or 10133 counting only the distinct ones).

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

Adding to 231330143232 its reverse (232341033132), we get a palindrome (463671176364).

The spelling of 231330143232 in words is "two hundred thirty-one billion, three hundred thirty million, one hundred forty-three thousand, two hundred thirty-two".