221225241 has 8 divisors (see below), whose sum is σ = 295035840. Its totient is φ = 147449072.

The previous prime is 221225209. The next prime is 221225309. The reversal of 221225241 is 142522122.

221225241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221225241 - 2⁵ = 221225209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221225441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19531 + ... + 28703.

It is an arithmetic number, because the mean of its divisors is an integer number (36879480).

Almost surely, 2^221225241 is an apocalyptic number.

It is an amenable number.

221225241 is a deficient number, since it is larger than the sum of its proper divisors (73810599).

221225241 is an equidigital number, since it uses as much as digits as its factorization.

221225241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17215.

The product of its digits is 640, while the sum is 21.

The square root of 221225241 is about 14873.6424926781. The cubic root of 221225241 is about 604.7996887115.

Adding to 221225241 its reverse (142522122), we get a palindrome (363747363).

The spelling of 221225241 in words is "two hundred twenty-one million, two hundred twenty-five thousand, two hundred forty-one".