222159661 has 2 divisors, whose sum is σ = 222159662. Its totient is φ = 222159660.

The previous prime is 222159643. The next prime is 222159697. The reversal of 222159661 is 166951222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221712100 + 447561 = 14890^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 222159661 - 2²¹ = 220062509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222151661) 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, 111079830 + 111079831.

It is an arithmetic number, because the mean of its divisors is an integer number (111079831).

Almost surely, 2^222159661 is an apocalyptic number.

It is an amenable number.

222159661 is a deficient number, since it is larger than the sum of its proper divisors (1).

222159661 is an equidigital number, since it uses as much as digits as its factorization.

222159661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 222159661 is about 14905.0213351072. The cubic root of 222159661 is about 605.6500182999.

The spelling of 222159661 in words is "two hundred twenty-two million, one hundred fifty-nine thousand, six hundred sixty-one".