43422509 has 4 divisors (see below), whose sum is σ = 46762716. Its totient is φ = 40082304.

The previous prime is 43422503. The next prime is 43422523. The reversal of 43422509 is 90522434.

43422509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19166884 + 24255625 = 4378^2 + 4925^2 .

It is a cyclic number.

It is not a de Polignac number, because 43422509 - 2⁴ = 43422493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43422503) 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 3 ways as a sum of consecutive naturals, for example, 1670084 + ... + 1670109.

It is an arithmetic number, because the mean of its divisors is an integer number (11690679).

Almost surely, 2^43422509 is an apocalyptic number.

It is an amenable number.

43422509 is a deficient number, since it is larger than the sum of its proper divisors (3340207).

43422509 is a wasteful number, since it uses less digits than its factorization.

43422509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340206.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 43422509 is about 6589.5757830076. The cubic root of 43422509 is about 351.4835234047.

The spelling of 43422509 in words is "forty-three million, four hundred twenty-two thousand, five hundred nine".