43201591 has 2 divisors, whose sum is σ = 43201592. Its totient is φ = 43201590.

The previous prime is 43201549. The next prime is 43201621. The reversal of 43201591 is 19510234.

43201591 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 a de Polignac number, because none of the positive numbers 2^k-43201591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43201531) 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, 21600795 + 21600796.

It is an arithmetic number, because the mean of its divisors is an integer number (21600796).

Almost surely, 2^43201591 is an apocalyptic number.

43201591 is a deficient number, since it is larger than the sum of its proper divisors (1).

43201591 is an equidigital number, since it uses as much as digits as its factorization.

43201591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 43201591 is about 6572.7917204183. The cubic root of 43201591 is about 350.8864360440.

The spelling of 43201591 in words is "forty-three million, two hundred one thousand, five hundred ninety-one".