223221289 has 2 divisors, whose sum is σ = 223221290. Its totient is φ = 223221288.

The previous prime is 223221269. The next prime is 223221301. The reversal of 223221289 is 982122322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223203600 + 17689 = 14940^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 223221289 - 2⁷ = 223221161 is a prime.

It is a super-3 number, since 3×223221289³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223221289.

It is not a weakly prime, because it can be changed into another prime (223221239) 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, 111610644 + 111610645.

It is an arithmetic number, because the mean of its divisors is an integer number (111610645).

Almost surely, 2^223221289 is an apocalyptic number.

It is an amenable number.

223221289 is a deficient number, since it is larger than the sum of its proper divisors (1).

223221289 is an equidigital number, since it uses as much as digits as its factorization.

223221289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 223221289 is about 14940.5919896101. The cubic root of 223221289 is about 606.6132197746.

The spelling of 223221289 in words is "two hundred twenty-three million, two hundred twenty-one thousand, two hundred eighty-nine".