221132241 has 64 divisors (see below), whose sum is σ = 380160000. Its totient is φ = 125634240.

The previous prime is 221132167. The next prime is 221132251. The reversal of 221132241 is 142231122.

It is a happy number.

It is not a de Polignac number, because 221132241 - 2¹⁰ = 221131217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221132251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 840676 + ... + 840938.

It is an arithmetic number, because the mean of its divisors is an integer number (5940000).

Almost surely, 2^221132241 is an apocalyptic number.

It is an amenable number.

221132241 is a deficient number, since it is larger than the sum of its proper divisors (159027759).

221132241 is a wasteful number, since it uses less digits than its factorization.

221132241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 445 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 221132241 is about 14870.5158283094. The cubic root of 221132241 is about 604.7149270535.

Adding to 221132241 its reverse (142231122), we get a palindrome (363363363).

The spelling of 221132241 in words is "two hundred twenty-one million, one hundred thirty-two thousand, two hundred forty-one".