225321289 has 8 divisors (see below), whose sum is σ = 229683272. Its totient is φ = 220993920.

The previous prime is 225321287. The next prime is 225321293. The reversal of 225321289 is 982123522.

It can be written as a sum of positive squares in 4 ways, for example, as 81225 + 225240064 = 285^2 + 15008^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225321289 - 2¹ = 225321287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225321287) 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 7 ways as a sum of consecutive naturals, for example, 4687 + ... + 21739.

It is an arithmetic number, because the mean of its divisors is an integer number (28710409).

Almost surely, 2^225321289 is an apocalyptic number.

It is an amenable number.

225321289 is a deficient number, since it is larger than the sum of its proper divisors (4361983).

225321289 is a wasteful number, since it uses less digits than its factorization.

225321289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17307.

The product of its digits is 17280, while the sum is 34.

The square root of 225321289 is about 15010.7058128524. The cubic root of 225321289 is about 608.5095647711.

The spelling of 225321289 in words is "two hundred twenty-five million, three hundred twenty-one thousand, two hundred eighty-nine".