221338 has 8 divisors (see below), whose sum is σ = 357588. Its totient is φ = 102144.

The previous prime is 221327. The next prime is 221393. The reversal of 221338 is 833122.

It is a happy number.

221338 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 218089 + 3249 = 467^2 + 57^2 .

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

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4231 + ... + 4282.

2²²¹³³⁸ is an apocalyptic number.

221338 is a deficient number, since it is larger than the sum of its proper divisors (136250).

221338 is a wasteful number, since it uses less digits than its factorization.

221338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528.

The product of its digits is 288, while the sum is 19.

The square root of 221338 is about 470.4657267007. The cubic root of 221338 is about 60.4902427176.

The spelling of 221338 in words is "two hundred twenty-one thousand, three hundred thirty-eight".