221359 has 4 divisors (see below), whose sum is σ = 226800. Its totient is φ = 215920.

The previous prime is 221327. The next prime is 221393. The reversal of 221359 is 953122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221359 - 2⁵ = 221327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221399) 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, 2659 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2²²¹³⁵⁹ is an apocalyptic number.

221359 is a deficient number, since it is larger than the sum of its proper divisors (5441).

221359 is an equidigital number, since it uses as much as digits as its factorization.

221359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440.

The product of its digits is 540, while the sum is 22.

The square root of 221359 is about 470.4880444815. The cubic root of 221359 is about 60.4921557118.

The spelling of 221359 in words is "two hundred twenty-one thousand, three hundred fifty-nine".