43545043 has 2 divisors, whose sum is σ = 43545044. Its totient is φ = 43545042.

The previous prime is 43544989. The next prime is 43545067. The reversal of 43545043 is 34054534.

43545043 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 43545043 - 2²¹ = 41447891 is a prime.

It is not a weakly prime, because it can be changed into another prime (43545343) 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, 21772521 + 21772522.

It is an arithmetic number, because the mean of its divisors is an integer number (21772522).

Almost surely, 2^43545043 is an apocalyptic number.

43545043 is a deficient number, since it is larger than the sum of its proper divisors (1).

43545043 is an equidigital number, since it uses as much as digits as its factorization.

43545043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 43545043 is about 6598.8667966553. The cubic root of 43545043 is about 351.8138300789.

Adding to 43545043 its reverse (34054534), we get a palindrome (77599577).

The spelling of 43545043 in words is "forty-three million, five hundred forty-five thousand, forty-three".