231140043 has 6 divisors (see below), whose sum is σ = 333868964. Its totient is φ = 154093356.

The previous prime is 231140033. The next prime is 231140047. The reversal of 231140043 is 340041132.

It is not a de Polignac number, because 231140043 - 2⁴ = 231140027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231139998 and 231140025.

It is not an unprimeable number, because it can be changed into a prime (231140047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12841105 + ... + 12841122.

Almost surely, 2^231140043 is an apocalyptic number.

231140043 is a deficient number, since it is larger than the sum of its proper divisors (102728921).

231140043 is a wasteful number, since it uses less digits than its factorization.

231140043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25682233 (or 25682230 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231140043 is about 15203.2905319868. The cubic root of 231140043 is about 613.7032123926.

Adding to 231140043 its reverse (340041132), we get a palindrome (571181175).

The spelling of 231140043 in words is "two hundred thirty-one million, one hundred forty thousand, forty-three".