43009855 has 16 divisors (see below), whose sum is σ = 59102784. Its totient is φ = 29433600.

The previous prime is 43009849. The next prime is 43009859. The reversal of 43009855 is 55890034.

43009855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43009855 - 2⁵ = 43009823 is a prime.

It is a Duffinian number.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 43009855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43009859) 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 in 15 ways as a sum of consecutive naturals, for example, 23659 + ... + 25411.

It is an arithmetic number, because the mean of its divisors is an integer number (3693924).

Almost surely, 2^43009855 is an apocalyptic number.

43009855 is a deficient number, since it is larger than the sum of its proper divisors (16092929).

43009855 is a wasteful number, since it uses less digits than its factorization.

43009855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 43009855 is about 6558.1899179575. The cubic root of 43009855 is about 350.3665683260.

Adding to 43009855 its reverse (55890034), we get a palindrome (98899889).

The spelling of 43009855 in words is "forty-three million, nine thousand, eight hundred fifty-five".