221324227 has 2 divisors, whose sum is σ = 221324228. Its totient is φ = 221324226.

The previous prime is 221324203. The next prime is 221324261. The reversal of 221324227 is 722423122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221324227 is a prime.

It is not a weakly prime, because it can be changed into another prime (221328227) 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 as a sum of consecutive naturals, namely, 110662113 + 110662114.

It is an arithmetic number, because the mean of its divisors is an integer number (110662114).

Almost surely, 2^221324227 is an apocalyptic number.

221324227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221324227 is an equidigital number, since it uses as much as digits as its factorization.

221324227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 221324227 is about 14876.9696847174. The cubic root of 221324227 is about 604.8898800099.

Adding to 221324227 its reverse (722423122), we get a palindrome (943747349).

The spelling of 221324227 in words is "two hundred twenty-one million, three hundred twenty-four thousand, two hundred twenty-seven".