231231043 has 2 divisors, whose sum is σ = 231231044. Its totient is φ = 231231042.

The previous prime is 231231041. The next prime is 231231047. The reversal of 231231043 is 340132132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231231043 - 2¹ = 231231041 is a prime.

Together with 231231041, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231231043.

It is not a weakly prime, because it can be changed into another prime (231231041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115615521 + 115615522.

It is an arithmetic number, because the mean of its divisors is an integer number (115615522).

Almost surely, 2^231231043 is an apocalyptic number.

231231043 is a deficient number, since it is larger than the sum of its proper divisors (1).

231231043 is an equidigital number, since it uses as much as digits as its factorization.

231231043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231231043 is about 15206.2830106506. The cubic root of 231231043 is about 613.7837402899.

Adding to 231231043 its reverse (340132132), we get a palindrome (571363175).

The spelling of 231231043 in words is "two hundred thirty-one million, two hundred thirty-one thousand, forty-three".