221313227 has 2 divisors, whose sum is σ = 221313228. Its totient is φ = 221313226.

The previous prime is 221313193. The next prime is 221313241. The reversal of 221313227 is 722313122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221313227 - 2¹⁴ = 221296843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221313277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656613 + 110656614.

It is an arithmetic number, because the mean of its divisors is an integer number (110656614).

Almost surely, 2^221313227 is an apocalyptic number.

221313227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221313227 is an equidigital number, since it uses as much as digits as its factorization.

221313227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 221313227 is about 14876.5999811785. The cubic root of 221313227 is about 604.8798586655.

Adding to 221313227 its reverse (722313122), we get a palindrome (943626349).

The spelling of 221313227 in words is "two hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-seven".