40043423233523 has 2 divisors, whose sum is σ = 40043423233524. Its totient is φ = 40043423233522.

The previous prime is 40043423233439. The next prime is 40043423233547. The reversal of 40043423233523 is 32533232434004.

It is a happy number.

40043423233523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40043423233523 - 2²⁰ = 40043422184947 is a prime.

It is not a weakly prime, because it can be changed into another prime (40043423233823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021711616761 + 20021711616762.

It is an arithmetic number, because the mean of its divisors is an integer number (20021711616762).

Almost surely, 2^{40043423233523} is an apocalyptic number.

40043423233523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043423233523 is an equidigital number, since it uses as much as digits as its factorization.

40043423233523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 38.

Adding to 40043423233523 its reverse (32533232434004), we get a palindrome (72576655667527).

The spelling of 40043423233523 in words is "forty trillion, forty-three billion, four hundred twenty-three million, two hundred thirty-three thousand, five hundred twenty-three".