2444221 has 4 divisors (see below), whose sum is σ = 2632252. Its totient is φ = 2256192.

The previous prime is 2444219. The next prime is 2444251. The reversal of 2444221 is 1224442.

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 881721 + 1562500 = 939^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2444221 - 2¹ = 2444219 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 (2444251) 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, 93996 + ... + 94021.

It is an arithmetic number, because the mean of its divisors is an integer number (658063).

2^2444221 is an apocalyptic number.

It is an amenable number.

2444221 is a deficient number, since it is larger than the sum of its proper divisors (188031).

2444221 is a wasteful number, since it uses less digits than its factorization.

2444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188030.

The product of its digits is 512, while the sum is 19.

The square root of 2444221 is about 1563.4004605347. The cubic root of 2444221 is about 134.7038960504.

Adding to 2444221 its reverse (1224442), we get a palindrome (3668663).

It can be divided in two parts, 244 and 4221, that added together give a triangular number (4465 = T₉₄).

The spelling of 2444221 in words is "two million, four hundred forty-four thousand, two hundred twenty-one".