43242321 has 4 divisors (see below), whose sum is σ = 57656432. Its totient is φ = 28828212.

The previous prime is 43242319. The next prime is 43242349. The reversal of 43242321 is 12324234.

43242321 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 43242321 - 2¹ = 43242319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43242301) 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, 7207051 + ... + 7207056.

It is an arithmetic number, because the mean of its divisors is an integer number (14414108).

Almost surely, 2^43242321 is an apocalyptic number.

It is an amenable number.

43242321 is a deficient number, since it is larger than the sum of its proper divisors (14414111).

43242321 is a wasteful number, since it uses less digits than its factorization.

43242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414110.

The product of its digits is 1152, while the sum is 21.

The square root of 43242321 is about 6575.8893695074. The cubic root of 43242321 is about 350.9966720734.

Adding to 43242321 its reverse (12324234), we get a palindrome (55566555).

The spelling of 43242321 in words is "forty-three million, two hundred forty-two thousand, three hundred twenty-one".