231143432140 has 12 divisors (see below), whose sum is σ = 485401207536. Its totient is φ = 92457372848.

The previous prime is 231143432129. The next prime is 231143432141. The reversal of 231143432140 is 41234341132.

It is a happy number.

231143432140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231143432099 and 231143432108.

It is not an unprimeable number, because it can be changed into a prime (231143432141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5778585784 + ... + 5778585823.

It is an arithmetic number, because the mean of its divisors is an integer number (40450100628).

Almost surely, 2^231143432140 is an apocalyptic number.

231143432140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231143432140 is an abundant number, since it is smaller than the sum of its proper divisors (254257775396).

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

231143432140 is a wasteful number, since it uses less digits than its factorization.

231143432140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11557171616 (or 11557171614 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 231143432140 its reverse (41234341132), we get a palindrome (272377773272).

The spelling of 231143432140 in words is "two hundred thirty-one billion, one hundred forty-three million, four hundred thirty-two thousand, one hundred forty".