221934 has 16 divisors (see below), whose sum is σ = 453888. Its totient is φ = 72312.

The previous prime is 221909. The next prime is 221941. The reversal of 221934 is 439122.

221934 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221934.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221934.

It is an unprimeable number.

221934 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (28368).

2²²¹⁹³⁴ is an apocalyptic number.

221934 is an abundant number, since it is smaller than the sum of its proper divisors (231954).

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

221934 is a wasteful number, since it uses less digits than its factorization.

221934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839.

The product of its digits is 432, while the sum is 21.

The square root of 221934 is about 471.0987157698. The cubic root of 221934 is about 60.5444883714.

The spelling of 221934 in words is "two hundred twenty-one thousand, nine hundred thirty-four".