211980 has 24 divisors (see below), whose sum is σ = 593712. Its totient is φ = 56512.

The previous prime is 211979. The next prime is 211997. The reversal of 211980 is 89112.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1707 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (24738).

2²¹¹⁹⁸⁰ is an apocalyptic number.

211980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211980 is an abundant number, since it is smaller than the sum of its proper divisors (381732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211980 is a wasteful number, since it uses less digits than its factorization.

211980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 211980 is about 460.4128582045. The cubic root of 211980 is about 59.6254444455.

The spelling of 211980 in words is "two hundred eleven thousand, nine hundred eighty".