4433444221 has 4 divisors (see below), whose sum is σ = 4455949212. Its totient is φ = 4410939232.

The previous prime is 4433444219. The next prime is 4433444251. The reversal of 4433444221 is 1224443344.

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 2944256121 + 1489188100 = 54261^2 + 38590^2 .

It is a cyclic number.

It is not a de Polignac number, because 4433444221 - 2¹ = 4433444219 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 (4433444201) 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, 11252200 + ... + 11252593.

It is an arithmetic number, because the mean of its divisors is an integer number (1113987303).

Almost surely, 2^4433444221 is an apocalyptic number.

It is an amenable number.

4433444221 is a deficient number, since it is larger than the sum of its proper divisors (22504991).

4433444221 is a wasteful number, since it uses less digits than its factorization.

4433444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22504990.

The product of its digits is 36864, while the sum is 31.

The square root of 4433444221 is about 66584.1138786122. The cubic root of 4433444221 is about 1642.7838180625.

Adding to 4433444221 its reverse (1224443344), we get a palindrome (5657887565).

The spelling of 4433444221 in words is "four billion, four hundred thirty-three million, four hundred forty-four thousand, two hundred twenty-one".