224444421 has 12 divisors (see below), whose sum is σ = 343268172. Its totient is φ = 140827776.

The previous prime is 224444393. The next prime is 224444449. The reversal of 224444421 is 124444422.

It is an interprime number because it is at equal distance from previous prime (224444393) and next prime (224444449).

It can be written as a sum of positive squares in 2 ways, for example, as 132572196 + 91872225 = 11514^2 + 9585^2 .

It is not a de Polignac number, because 224444421 - 2⁶ = 224444357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224444461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733326 + ... + 733631.

It is an arithmetic number, because the mean of its divisors is an integer number (28605681).

Almost surely, 2^224444421 is an apocalyptic number.

It is an amenable number.

224444421 is a deficient number, since it is larger than the sum of its proper divisors (118823751).

224444421 is a wasteful number, since it uses less digits than its factorization.

224444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466980 (or 1466977 counting only the distinct ones).

The product of its digits is 8192, while the sum is 27.

The square root of 224444421 is about 14981.4692537147. The cubic root of 224444421 is about 607.7191730640.

Adding to 224444421 its reverse (124444422), we get a palindrome (348888843).

Subtracting from 224444421 its reverse (124444422), we obtain a palindrome (99999999).

It can be divided in two parts, 2244 and 44421, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 224444421 in words is "two hundred twenty-four million, four hundred forty-four thousand, four hundred twenty-one".