221326 has 8 divisors (see below), whose sum is σ = 379440. Its totient is φ = 94848.

The previous prime is 221317. The next prime is 221327. The reversal of 221326 is 623122.

221326 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221327) 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, 7891 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (47430).

2²²¹³²⁶ is an apocalyptic number.

221326 is a deficient number, since it is larger than the sum of its proper divisors (158114).

221326 is a wasteful number, since it uses less digits than its factorization.

221326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15818.

The product of its digits is 144, while the sum is 16.

The square root of 221326 is about 470.4529732077. The cubic root of 221326 is about 60.4891495237.

Adding to 221326 its reverse (623122), we get a palindrome (844448).

The spelling of 221326 in words is "two hundred twenty-one thousand, three hundred twenty-six".