43324421 has 4 divisors (see below), whose sum is σ = 49513632. Its totient is φ = 37135212.

The previous prime is 43324409. The next prime is 43324481. The reversal of 43324421 is 12442334.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43324421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43324481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3094595 + ... + 3094608.

It is an arithmetic number, because the mean of its divisors is an integer number (12378408).

Almost surely, 2^43324421 is an apocalyptic number.

It is an amenable number.

43324421 is a deficient number, since it is larger than the sum of its proper divisors (6189211).

43324421 is an equidigital number, since it uses as much as digits as its factorization.

43324421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6189210.

The product of its digits is 2304, while the sum is 23.

The square root of 43324421 is about 6582.1289109224. The cubic root of 43324421 is about 351.2186660836.

Adding to 43324421 its reverse (12442334), we get a palindrome (55766755).

The spelling of 43324421 in words is "forty-three million, three hundred twenty-four thousand, four hundred twenty-one".