43441221 has 4 divisors (see below), whose sum is σ = 57921632. Its totient is φ = 28960812.

The previous prime is 43441213. The next prime is 43441241. The reversal of 43441221 is 12214434.

43441221 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 43441221 - 2³ = 43441213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43441241) 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, 7240201 + ... + 7240206.

It is an arithmetic number, because the mean of its divisors is an integer number (14480408).

Almost surely, 2^43441221 is an apocalyptic number.

It is an amenable number.

43441221 is a deficient number, since it is larger than the sum of its proper divisors (14480411).

43441221 is a wasteful number, since it uses less digits than its factorization.

43441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480410.

The product of its digits is 768, while the sum is 21.

The square root of 43441221 is about 6590.9954483371. The cubic root of 43441221 is about 351.5340042523.

Adding to 43441221 its reverse (12214434), we get a palindrome (55655655).

It can be divided in two parts, 4344 and 1221, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 43441221 in words is "forty-three million, four hundred forty-one thousand, two hundred twenty-one".