4430420221 has 4 divisors (see below), whose sum is σ = 4431528252. Its totient is φ = 4429312192.

The previous prime is 4430420143. The next prime is 4430420227. The reversal of 4430420221 is 1220240344.

It is a happy number.

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 1472256900 + 2958163321 = 38370^2 + 54389^2 .

It is a cyclic number.

It is not a de Polignac number, because 4430420221 - 2⁹ = 4430419709 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4430420192 and 4430420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4430420227) 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, 547996 + ... + 556021.

It is an arithmetic number, because the mean of its divisors is an integer number (1107882063).

Almost surely, 2^4430420221 is an apocalyptic number.

It is an amenable number.

4430420221 is a deficient number, since it is larger than the sum of its proper divisors (1108031).

4430420221 is a wasteful number, since it uses less digits than its factorization.

4430420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108030.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4430420221 is about 66561.4018857776. The cubic root of 4430420221 is about 1642.4102252880.

Adding to 4430420221 its reverse (1220240344), we get a palindrome (5650660565).

The spelling of 4430420221 in words is "four billion, four hundred thirty million, four hundred twenty thousand, two hundred twenty-one".