211671 has 12 divisors (see below), whose sum is σ = 316680. Its totient is φ = 136080.

The previous prime is 211663. The next prime is 211681. The reversal of 211671 is 176112.

It is not a de Polignac number, because 211671 - 2³ = 211663 is a prime.

It is a super-2 number, since 2×211671² = 89609224482, which contains 22 as substring.

211671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (26390).

2²¹¹⁶⁷¹ is an apocalyptic number.

211671 is a deficient number, since it is larger than the sum of its proper divisors (105009).

211671 is a wasteful number, since it uses less digits than its factorization.

211671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 843 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 211671 is about 460.0771674404. The cubic root of 211671 is about 59.5964586578.

Adding to 211671 its reverse (176112), we get a palindrome (387783).

It can be divided in two parts, 2116 and 71, that added together give a 7-th power (2187 = 3⁷).

The spelling of 211671 in words is "two hundred eleven thousand, six hundred seventy-one".