44213221 has 4 divisors (see below), whose sum is σ = 47614252. Its totient is φ = 40812192.

The previous prime is 44213207. The next prime is 44213231. The reversal of 44213221 is 12231244.

44213221 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 can be written as a sum of positive squares in 2 ways, for example, as 8381025 + 35832196 = 2895^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 44213221 - 2⁵ = 44213189 is a prime.

It is a super-2 number, since 2×44213221² = 3909617822389682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44213201) 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, 1700496 + ... + 1700521.

It is an arithmetic number, because the mean of its divisors is an integer number (11903563).

Almost surely, 2^44213221 is an apocalyptic number.

It is an amenable number.

44213221 is a deficient number, since it is larger than the sum of its proper divisors (3401031).

44213221 is a wasteful number, since it uses less digits than its factorization.

44213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401030.

The product of its digits is 384, while the sum is 19.

The square root of 44213221 is about 6649.3022942261. The cubic root of 44213221 is about 353.6041757669.

Adding to 44213221 its reverse (12231244), we get a palindrome (56444465).

The spelling of 44213221 in words is "forty-four million, two hundred thirteen thousand, two hundred twenty-one".