221153 has 4 divisors (see below), whose sum is σ = 234180. Its totient is φ = 208128.

The previous prime is 221101. The next prime is 221159. The reversal of 221153 is 351122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 113569 = 328^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 221153 - 2⁸ = 220897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221159) 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, 6488 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (58545).

2²²¹¹⁵³ is an apocalyptic number.

It is an amenable number.

221153 is a deficient number, since it is larger than the sum of its proper divisors (13027).

221153 is a wasteful number, since it uses less digits than its factorization.

221153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13026.

The product of its digits is 60, while the sum is 14.

The square root of 221153 is about 470.2690719152. The cubic root of 221153 is about 60.4733849192.

Adding to 221153 its reverse (351122), we get a palindrome (572275).

The spelling of 221153 in words is "two hundred twenty-one thousand, one hundred fifty-three".