4424013221 has 4 divisors (see below), whose sum is σ = 4424796012. Its totient is φ = 4423230432.

The previous prime is 4424013203. The next prime is 4424013277. The reversal of 4424013221 is 1223104244.

4424013221 is digitally balanced in base 3, 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 395572321 + 4028440900 = 19889^2 + 63470^2 .

It is a cyclic number.

It is not a de Polignac number, because 4424013221 - 2²² = 4419818917 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 (4424013421) 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, 382856 + ... + 394241.

It is an arithmetic number, because the mean of its divisors is an integer number (1106199003).

Almost surely, 2^4424013221 is an apocalyptic number.

It is an amenable number.

4424013221 is a deficient number, since it is larger than the sum of its proper divisors (782791).

4424013221 is an equidigital number, since it uses as much as digits as its factorization.

4424013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782790.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4424013221 is about 66513.2559795414. The cubic root of 4424013221 is about 1641.6181259384.

Adding to 4424013221 its reverse (1223104244), we get a palindrome (5647117465).

The spelling of 4424013221 in words is "four billion, four hundred twenty-four million, thirteen thousand, two hundred twenty-one".