201182161 has 2 divisors, whose sum is σ = 201182162. Its totient is φ = 201182160.

The previous prime is 201182147. The next prime is 201182197. The reversal of 201182161 is 161281102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100881936 + 100300225 = 10044^2 + 10015^2 .

It is a cyclic number.

It is not a de Polignac number, because 201182161 - 2⁵ = 201182129 is a prime.

It is not a weakly prime, because it can be changed into another prime (201182561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100591080 + 100591081.

It is an arithmetic number, because the mean of its divisors is an integer number (100591081).

Almost surely, 2^201182161 is an apocalyptic number.

It is an amenable number.

201182161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201182161 is an equidigital number, since it uses as much as digits as its factorization.

201182161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 201182161 is about 14183.8697470049. The cubic root of 201182161 is about 585.9535047968.

The spelling of 201182161 in words is "two hundred one million, one hundred eighty-two thousand, one hundred sixty-one".