211930 has 8 divisors (see below), whose sum is σ = 381492. Its totient is φ = 84768.

The previous prime is 211927. The next prime is 211931. The reversal of 211930 is 39112.

211930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 184041 + 27889 = 429^2 + 167^2 .

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

It is not an unprimeable number, because it can be changed into a prime (211931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10587 + ... + 10606.

2²¹¹⁹³⁰ is an apocalyptic number.

211930 is a deficient number, since it is larger than the sum of its proper divisors (169562).

211930 is a wasteful number, since it uses less digits than its factorization.

211930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21200.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 211930 is about 460.3585559105. The cubic root of 211930 is about 59.6207560997.

The spelling of 211930 in words is "two hundred eleven thousand, nine hundred thirty".