225001321 has 4 divisors (see below), whose sum is σ = 225120852. Its totient is φ = 224881792.

The previous prime is 225001313. The next prime is 225001333. The reversal of 225001321 is 123100522.

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 73342096 + 151659225 = 8564^2 + 12315^2 .

It is a cyclic number.

It is not a de Polignac number, because 225001321 - 2³ = 225001313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225001295 and 225001304.

It is not an unprimeable number, because it can be changed into a prime (225001351) 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 in 3 ways as a sum of consecutive naturals, for example, 56896 + ... + 60721.

It is an arithmetic number, because the mean of its divisors is an integer number (56280213).

Almost surely, 2^225001321 is an apocalyptic number.

It is an amenable number.

225001321 is a deficient number, since it is larger than the sum of its proper divisors (119531).

225001321 is a wasteful number, since it uses less digits than its factorization.

225001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119530.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 225001321 is about 15000.0440332687. The cubic root of 225001321 is about 608.2213898645.

Adding to 225001321 its reverse (123100522), we get a palindrome (348101843).

The spelling of 225001321 in words is "two hundred twenty-five million, one thousand, three hundred twenty-one".