225301221 has 72 divisors (see below), whose sum is σ = 375473280. Its totient is φ = 129724416.

The previous prime is 225301207. The next prime is 225301231. The reversal of 225301221 is 122103522.

It is not a de Polignac number, because 225301221 - 2⁶ = 225301157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225301194 and 225301203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225301231) 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 71 ways as a sum of consecutive naturals, for example, 2322645 + ... + 2322741.

Almost surely, 2^225301221 is an apocalyptic number.

It is an amenable number.

225301221 is a deficient number, since it is larger than the sum of its proper divisors (150172059).

225301221 is a wasteful number, since it uses less digits than its factorization.

225301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 225301221 is about 15010.0373417257. The cubic root of 225301221 is about 608.4914988166.

Adding to 225301221 its reverse (122103522), we get a palindrome (347404743).

It can be divided in two parts, 225301 and 221, that added together give a palindrome (225522).

The spelling of 225301221 in words is "two hundred twenty-five million, three hundred one thousand, two hundred twenty-one".