43243040231 has 2 divisors, whose sum is σ = 43243040232. Its totient is φ = 43243040230.

The previous prime is 43243040227. The next prime is 43243040261. The reversal of 43243040231 is 13204034234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43243040231 - 2² = 43243040227 is a prime.

It is a super-2 number, since 2×43243040231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43243040231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43243040261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621520115 + 21621520116.

It is an arithmetic number, because the mean of its divisors is an integer number (21621520116).

Almost surely, 2^43243040231 is an apocalyptic number.

43243040231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243040231 is an equidigital number, since it uses as much as digits as its factorization.

43243040231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 43243040231 its reverse (13204034234), we get a palindrome (56447074465).

The spelling of 43243040231 in words is "forty-three billion, two hundred forty-three million, forty thousand, two hundred thirty-one".