43223639 has 4 divisors (see below), whose sum is σ = 45766224. Its totient is φ = 40681056.

The previous prime is 43223633. The next prime is 43223669. The reversal of 43223639 is 93632234.

43223639 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 is a cyclic number.

It is not a de Polignac number, because 43223639 - 2¹⁶ = 43158103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43223633) 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, 1271267 + ... + 1271300.

It is an arithmetic number, because the mean of its divisors is an integer number (11441556).

Almost surely, 2^43223639 is an apocalyptic number.

43223639 is a deficient number, since it is larger than the sum of its proper divisors (2542585).

43223639 is a wasteful number, since it uses less digits than its factorization.

43223639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542584.

The product of its digits is 23328, while the sum is 32.

The square root of 43223639 is about 6574.4687237829. The cubic root of 43223639 is about 350.9461177073.

The spelling of 43223639 in words is "forty-three million, two hundred twenty-three thousand, six hundred thirty-nine".