201662171 has 2 divisors, whose sum is σ = 201662172. Its totient is φ = 201662170.

The previous prime is 201662141. The next prime is 201662203. The reversal of 201662171 is 171266102.

201662171 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 is a cyclic number.

It is not a de Polignac number, because 201662171 - 2⁶ = 201662107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201662171.

It is not a weakly prime, because it can be changed into another prime (201662141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100831085 + 100831086.

It is an arithmetic number, because the mean of its divisors is an integer number (100831086).

Almost surely, 2^201662171 is an apocalyptic number.

201662171 is a deficient number, since it is larger than the sum of its proper divisors (1).

201662171 is an equidigital number, since it uses as much as digits as its factorization.

201662171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 201662171 is about 14200.7806475560. The cubic root of 201662171 is about 586.4191526839.

The spelling of 201662171 in words is "two hundred one million, six hundred sixty-two thousand, one hundred seventy-one".