211090 has 32 divisors (see below), whose sum is σ = 440640. Its totient is φ = 72000.

The previous prime is 211073. The next prime is 211093. The reversal of 211090 is 90112.

It is a self number, because there is not a number n which added to its sum of digits gives 211090.

It is not an unprimeable number, because it can be changed into a prime (211093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2040 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (13770).

2²¹¹⁰⁹⁰ is an apocalyptic number.

211090 is an abundant number, since it is smaller than the sum of its proper divisors (229550).

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

211090 is a wasteful number, since it uses less digits than its factorization.

211090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 211090 is about 459.4453177474. The cubic root of 211090 is about 59.5418813952.

It can be divided in two parts, 21 and 1090, that added together give a palindrome (1111).

The spelling of 211090 in words is "two hundred eleven thousand, ninety".