201685271 has 4 divisors (see below), whose sum is σ = 203273472. Its totient is φ = 200097072.

The previous prime is 201685259. The next prime is 201685283. The reversal of 201685271 is 172586102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (201685259) and next prime (201685283).

It is a cyclic number.

It is not a de Polignac number, because 201685271 - 2¹⁰ = 201684247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201685291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793910 + ... + 794163.

It is an arithmetic number, because the mean of its divisors is an integer number (50818368).

Almost surely, 2^201685271 is an apocalyptic number.

201685271 is a deficient number, since it is larger than the sum of its proper divisors (1588201).

201685271 is a wasteful number, since it uses less digits than its factorization.

201685271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588200.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 201685271 is about 14201.5939598342. The cubic root of 201685271 is about 586.4415428776.

The spelling of 201685271 in words is "two hundred one million, six hundred eighty-five thousand, two hundred seventy-one".