227289221 has 2 divisors, whose sum is σ = 227289222. Its totient is φ = 227289220.

The previous prime is 227289203. The next prime is 227289331. The reversal of 227289221 is 122982722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 90516196 = 11695^2 + 9514^2 .

It is a cyclic number.

It is not a de Polignac number, because 227289221 - 2⁶ = 227289157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227289421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113644610 + 113644611.

It is an arithmetic number, because the mean of its divisors is an integer number (113644611).

Almost surely, 2^227289221 is an apocalyptic number.

It is an amenable number.

227289221 is a deficient number, since it is larger than the sum of its proper divisors (1).

227289221 is an equidigital number, since it uses as much as digits as its factorization.

227289221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 227289221 is about 15076.1142540112. The cubic root of 227289221 is about 610.2759845852.

The spelling of 227289221 in words is "two hundred twenty-seven million, two hundred eighty-nine thousand, two hundred twenty-one".