231143440041 has 12 divisors (see below), whose sum is σ = 334132892340. Its totient is φ = 153976072320.

The previous prime is 231143440027. The next prime is 231143440043. The reversal of 231143440041 is 140044341132.

231143440041 is a `hidden beast` number, since 2 + 311 + 4 + 344 + 0 + 0 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 182866561641 + 48276878400 = 427629^2 + 219720^2 .

It is not a de Polignac number, because 231143440041 - 2¹⁴ = 231143423657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231143439987 and 231143440014.

It is not an unprimeable number, because it can be changed into a prime (231143440043) 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, 9950620 + ... + 9973821.

It is an arithmetic number, because the mean of its divisors is an integer number (27844407695).

Almost surely, 2^231143440041 is an apocalyptic number.

It is an amenable number.

231143440041 is a deficient number, since it is larger than the sum of its proper divisors (102989452299).

231143440041 is a wasteful number, since it uses less digits than its factorization.

231143440041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19925736 (or 19925733 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231143440041 its reverse (140044341132), we get a palindrome (371187781173).

The spelling of 231143440041 in words is "two hundred thirty-one billion, one hundred forty-three million, four hundred forty thousand, forty-one".