222206669 has 2 divisors, whose sum is σ = 222206670. Its totient is φ = 222206668.

The previous prime is 222206627. The next prime is 222206681. The reversal of 222206669 is 966602222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216384100 + 5822569 = 14710^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 222206669 - 2¹² = 222202573 is a prime.

It is a super-2 number, since 2×222206669² = 98751607496151122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222206689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111103334 + 111103335.

It is an arithmetic number, because the mean of its divisors is an integer number (111103335).

Almost surely, 2^222206669 is an apocalyptic number.

It is an amenable number.

222206669 is a deficient number, since it is larger than the sum of its proper divisors (1).

222206669 is an equidigital number, since it uses as much as digits as its factorization.

222206669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 222206669 is about 14906.5981699380. The cubic root of 222206669 is about 605.6927329075.

The spelling of 222206669 in words is "two hundred twenty-two million, two hundred six thousand, six hundred sixty-nine".