211889671 has 6 divisors (see below), whose sum is σ = 246483960. Its totient is φ = 181619676.

The previous prime is 211889669. The next prime is 211889701. The reversal of 211889671 is 176988112.

It is a happy number.

It is not a de Polignac number, because 211889671 - 2¹ = 211889669 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 (211889611) 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, 2162091 + ... + 2162188.

It is an arithmetic number, because the mean of its divisors is an integer number (41080660).

Almost surely, 2^211889671 is an apocalyptic number.

211889671 is a deficient number, since it is larger than the sum of its proper divisors (34594289).

211889671 is an equidigital number, since it uses as much as digits as its factorization.

211889671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324293 (or 4324286 counting only the distinct ones).

The product of its digits is 48384, while the sum is 43.

The square root of 211889671 is about 14556.4305720874. The cubic root of 211889671 is about 596.1697403642.

The spelling of 211889671 in words is "two hundred eleven million, eight hundred eighty-nine thousand, six hundred seventy-one".