201534161 has 2 divisors, whose sum is σ = 201534162. Its totient is φ = 201534160.

The previous prime is 201534089. The next prime is 201534187. The reversal of 201534161 is 161435102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 79299025 = 11056^2 + 8905^2 .

It is a cyclic number.

It is not a de Polignac number, because 201534161 - 2²⁶ = 134425297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201534761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100767080 + 100767081.

It is an arithmetic number, because the mean of its divisors is an integer number (100767081).

Almost surely, 2^201534161 is an apocalyptic number.

It is an amenable number.

201534161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201534161 is an equidigital number, since it uses as much as digits as its factorization.

201534161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 201534161 is about 14196.2727854885. The cubic root of 201534161 is about 586.2950451156.

Adding to 201534161 its reverse (161435102), we get a palindrome (362969263).

The spelling of 201534161 in words is "two hundred one million, five hundred thirty-four thousand, one hundred sixty-one".