221336241 has 32 divisors (see below), whose sum is σ = 343388160. Its totient is φ = 124208256.

The previous prime is 221336231. The next prime is 221336261. The reversal of 221336241 is 142633122.

It is not a de Polignac number, because 221336241 - 2⁹ = 221335729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221336201) 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 31 ways as a sum of consecutive naturals, for example, 307480 + ... + 308198.

It is an arithmetic number, because the mean of its divisors is an integer number (10730880).

Almost surely, 2^221336241 is an apocalyptic number.

221336241 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221336241 is a deficient number, since it is larger than the sum of its proper divisors (122051919).

221336241 is a wasteful number, since it uses less digits than its factorization.

221336241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973.

The product of its digits is 1728, while the sum is 24.

The square root of 221336241 is about 14877.3734577042. The cubic root of 221336241 is about 604.9008247607.

Adding to 221336241 its reverse (142633122), we get a palindrome (363969363).

The spelling of 221336241 in words is "two hundred twenty-one million, three hundred thirty-six thousand, two hundred forty-one".