201030161 has 2 divisors, whose sum is σ = 201030162. Its totient is φ = 201030160.

The previous prime is 201030157. The next prime is 201030163. The reversal of 201030161 is 161030102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198274561 + 2755600 = 14081^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 201030161 - 2² = 201030157 is a prime.

Together with 201030163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201030163) 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, 100515080 + 100515081.

It is an arithmetic number, because the mean of its divisors is an integer number (100515081).

Almost surely, 2^201030161 is an apocalyptic number.

It is an amenable number.

201030161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201030161 is an equidigital number, since it uses as much as digits as its factorization.

201030161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201030161 is about 14178.5105353136. The cubic root of 201030161 is about 585.8058983155.

Adding to 201030161 its reverse (161030102), we get a palindrome (362060263).

The spelling of 201030161 in words is "two hundred one million, thirty thousand, one hundred sixty-one".