211138 has 8 divisors (see below), whose sum is σ = 318780. Its totient is φ = 104880.

The previous prime is 211129. The next prime is 211151. The reversal of 211138 is 831112.

211138 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 5929 = 453^2 + 77^2 .

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

It is an unprimeable number.

211138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228 + ... + 688.

2²¹¹¹³⁸ is an apocalyptic number.

211138 is a deficient number, since it is larger than the sum of its proper divisors (107642).

211138 is a wasteful number, since it uses less digits than its factorization.

211138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 48, while the sum is 16.

The square root of 211138 is about 459.4975516801. The cubic root of 211138 is about 59.5463941524.

The spelling of 211138 in words is "two hundred eleven thousand, one hundred thirty-eight".