221033 has 4 divisors (see below), whose sum is σ = 224400. Its totient is φ = 217668.

The previous prime is 221021. The next prime is 221047. The reversal of 221033 is 330122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221033 - 2¹⁰ = 220009 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221083) 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, 1583 + ... + 1716.

It is an arithmetic number, because the mean of its divisors is an integer number (56100).

2²²¹⁰³³ is an apocalyptic number.

It is an amenable number.

221033 is a deficient number, since it is larger than the sum of its proper divisors (3367).

221033 is an equidigital number, since it uses as much as digits as its factorization.

221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 221033 is about 470.1414680710. The cubic root of 221033 is about 60.4624451035.

Adding to 221033 its reverse (330122), we get a palindrome (551155).

The spelling of 221033 in words is "two hundred twenty-one thousand, thirty-three".