201871 has 8 divisors (see below), whose sum is σ = 215424. Its totient is φ = 188760.

The previous prime is 201847. The next prime is 201881. The reversal of 201871 is 178102.

201871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201871 - 2⁷ = 201743 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (26928).

2²⁰¹⁸⁷¹ is an apocalyptic number.

201871 is a deficient number, since it is larger than the sum of its proper divisors (13553).

201871 is a wasteful number, since it uses less digits than its factorization.

201871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 201871 is about 449.3005675492. The cubic root of 201871 is about 58.6621502779.

Adding to 201871 its reverse (178102), we get a palindrome (379973).

It can be divided in two parts, 20 and 1871, that added together give a triangular number (1891 = T₆₁).

The spelling of 201871 in words is "two hundred one thousand, eight hundred seventy-one".