224544421 has 2 divisors, whose sum is σ = 224544422. Its totient is φ = 224544420.

The previous prime is 224544407. The next prime is 224544433. The reversal of 224544421 is 124445422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222427396 + 2117025 = 14914^2 + 1455^2 .

It is a cyclic number.

It is not a de Polignac number, because 224544421 - 2⁷ = 224544293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224544421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224544461) 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 as a sum of consecutive naturals, namely, 112272210 + 112272211.

It is an arithmetic number, because the mean of its divisors is an integer number (112272211).

Almost surely, 2^224544421 is an apocalyptic number.

It is an amenable number.

224544421 is a deficient number, since it is larger than the sum of its proper divisors (1).

224544421 is an equidigital number, since it uses as much as digits as its factorization.

224544421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 28.

The square root of 224544421 is about 14984.8063384216. The cubic root of 224544421 is about 607.8094149953.

Adding to 224544421 its reverse (124445422), we get a palindrome (348989843).

The spelling of 224544421 in words is "two hundred twenty-four million, five hundred forty-four thousand, four hundred twenty-one".