171366161 has 2 divisors, whose sum is σ = 171366162. Its totient is φ = 171366160.

The previous prime is 171366157. The next prime is 171366179. The reversal of 171366161 is 161663171.

171366161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141729025 + 29637136 = 11905^2 + 5444^2 .

It is a cyclic number.

It is not a de Polignac number, because 171366161 - 2² = 171366157 is a prime.

It is a super-2 number, since 2×171366161² = 58732722271755842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171366121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85683080 + 85683081.

It is an arithmetic number, because the mean of its divisors is an integer number (85683081).

Almost surely, 2^171366161 is an apocalyptic number.

It is an amenable number.

171366161 is a deficient number, since it is larger than the sum of its proper divisors (1).

171366161 is an equidigital number, since it uses as much as digits as its factorization.

171366161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 171366161 is about 13090.6898595911. The cubic root of 171366161 is about 555.4458025695.

The spelling of 171366161 in words is "one hundred seventy-one million, three hundred sixty-six thousand, one hundred sixty-one".