222330161 has 2 divisors, whose sum is σ = 222330162. Its totient is φ = 222330160.

The previous prime is 222330149. The next prime is 222330179. The reversal of 222330161 is 161033222.

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., 219958561 + 2371600 = 14831^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 222330161 - 2¹⁰ = 222329137 is a prime.

It is not a weakly prime, because it can be changed into another prime (222330061) 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, 111165080 + 111165081.

It is an arithmetic number, because the mean of its divisors is an integer number (111165081).

Almost surely, 2^222330161 is an apocalyptic number.

It is an amenable number.

222330161 is a deficient number, since it is larger than the sum of its proper divisors (1).

222330161 is an equidigital number, since it uses as much as digits as its factorization.

222330161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 222330161 is about 14910.7397871467. The cubic root of 222330161 is about 605.8049172914.

Adding to 222330161 its reverse (161033222), we get a palindrome (383363383).

The spelling of 222330161 in words is "two hundred twenty-two million, three hundred thirty thousand, one hundred sixty-one".