222450161 has 2 divisors, whose sum is σ = 222450162. Its totient is φ = 222450160.

The previous prime is 222450139. The next prime is 222450187. The reversal of 222450161 is 161054222.

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., 119224561 + 103225600 = 10919^2 + 10160^2 .

It is a cyclic number.

It is not a de Polignac number, because 222450161 - 2¹⁰ = 222449137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222450121) 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, 111225080 + 111225081.

It is an arithmetic number, because the mean of its divisors is an integer number (111225081).

Almost surely, 2^222450161 is an apocalyptic number.

It is an amenable number.

222450161 is a deficient number, since it is larger than the sum of its proper divisors (1).

222450161 is an equidigital number, since it uses as much as digits as its factorization.

222450161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 222450161 is about 14914.7631895381. The cubic root of 222450161 is about 605.9138896333.

The spelling of 222450161 in words is "two hundred twenty-two million, four hundred fifty thousand, one hundred sixty-one".