221163 has 4 divisors (see below), whose sum is σ = 294888. Its totient is φ = 147440.

The previous prime is 221159. The next prime is 221171. The reversal of 221163 is 361122.

221163 is nontrivially palindromic in base 2.

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 221163 - 2² = 221159 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (221173) 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, 36858 + ... + 36863.

It is an arithmetic number, because the mean of its divisors is an integer number (73722).

2²²¹¹⁶³ is an apocalyptic number.

221163 is a deficient number, since it is larger than the sum of its proper divisors (73725).

221163 is an equidigital number, since it uses as much as digits as its factorization.

221163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73724.

The product of its digits is 72, while the sum is 15.

The square root of 221163 is about 470.2797040060. The cubic root of 221163 is about 60.4742963918.

Adding to 221163 its reverse (361122), we get a palindrome (582285).

The spelling of 221163 in words is "two hundred twenty-one thousand, one hundred sixty-three".