43344221 has 4 divisors (see below), whose sum is σ = 44054844. Its totient is φ = 42633600.

The previous prime is 43344209. The next prime is 43344227. The reversal of 43344221 is 12244334.

43344221 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 an emirpimes, since its reverse is a distinct semiprime: 12244334 = 2 ⋅6122167.

It can be written as a sum of positive squares in 2 ways, for example, as 4468996 + 38875225 = 2114^2 + 6235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43344221 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 (43344227) 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, 355220 + ... + 355341.

It is an arithmetic number, because the mean of its divisors is an integer number (11013711).

Almost surely, 2^43344221 is an apocalyptic number.

It is an amenable number.

43344221 is a deficient number, since it is larger than the sum of its proper divisors (710623).

43344221 is an equidigital number, since it uses as much as digits as its factorization.

43344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710622.

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

The square root of 43344221 is about 6583.6328117537. The cubic root of 43344221 is about 351.2721622436.

Adding to 43344221 its reverse (12244334), we get a palindrome (55588555).

The spelling of 43344221 in words is "forty-three million, three hundred forty-four thousand, two hundred twenty-one".