4400221 has 16 divisors (see below), whose sum is σ = 5209600. Its totient is φ = 3639168.

The previous prime is 4400213. The next prime is 4400261. The reversal of 4400221 is 1220044.

It is a cyclic number.

It is not a de Polignac number, because 4400221 - 2³ = 4400213 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 (4400261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40315 + ... + 40423.

It is an arithmetic number, because the mean of its divisors is an integer number (325600).

Almost surely, 2^4400221 is an apocalyptic number.

It is an amenable number.

4400221 is a deficient number, since it is larger than the sum of its proper divisors (809379).

4400221 is a wasteful number, since it uses less digits than its factorization.

4400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4400221 is about 2097.6703744869. The cubic root of 4400221 is about 163.8669975591.

Adding to 4400221 its reverse (1220044), we get a palindrome (5620265).

The spelling of 4400221 in words is "four million, four hundred thousand, two hundred twenty-one".