225043321 has 2 divisors, whose sum is σ = 225043322. Its totient is φ = 225043320.

The previous prime is 225043319. The next prime is 225043327. The reversal of 225043321 is 123340522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136890000 + 88153321 = 11700^2 + 9389^2 .

It is a cyclic number.

It is not a de Polignac number, because 225043321 - 2¹ = 225043319 is a prime.

Together with 225043319, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 225043292 and 225043301.

It is not a weakly prime, because it can be changed into another prime (225043327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112521660 + 112521661.

It is an arithmetic number, because the mean of its divisors is an integer number (112521661).

Almost surely, 2^225043321 is an apocalyptic number.

It is an amenable number.

225043321 is a deficient number, since it is larger than the sum of its proper divisors (1).

225043321 is an equidigital number, since it uses as much as digits as its factorization.

225043321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 225043321 is about 15001.4439638323. The cubic root of 225043321 is about 608.2592321742.

Adding to 225043321 its reverse (123340522), we get a palindrome (348383843).

The spelling of 225043321 in words is "two hundred twenty-five million, forty-three thousand, three hundred twenty-one".