201571 has 6 divisors (see below), whose sum is σ = 214260. Its totient is φ = 189108.

The previous prime is 201557. The next prime is 201577. The reversal of 201571 is 175102.

201571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201571 - 2¹¹ = 199523 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1906 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (35710).

2²⁰¹⁵⁷¹ is an apocalyptic number.

201571 is a deficient number, since it is larger than the sum of its proper divisors (12689).

201571 is an equidigital number, since it uses as much as digits as its factorization.

201571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 201571 is about 448.9665911847. The cubic root of 201571 is about 58.6330766450.

Adding to 201571 its reverse (175102), we get a palindrome (376673).

The spelling of 201571 in words is "two hundred one thousand, five hundred seventy-one".