221333033 has 4 divisors (see below), whose sum is σ = 232982160. Its totient is φ = 209683908.

The previous prime is 221333027. The next prime is 221333041. The reversal of 221333033 is 330333122.

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 221333033 - 2²⁰ = 220284457 is a prime.

It is a super-2 number, since 2×221333033² = 97976622993958178, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221332996 and 221333014.

It is not an unprimeable number, because it can be changed into a prime (221333023) 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, 5824535 + ... + 5824572.

It is an arithmetic number, because the mean of its divisors is an integer number (58245540).

Almost surely, 2^221333033 is an apocalyptic number.

It is an amenable number.

221333033 is a deficient number, since it is larger than the sum of its proper divisors (11649127).

221333033 is a wasteful number, since it uses less digits than its factorization.

221333033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11649126.

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 221333033 is about 14877.2656425837. The cubic root of 221333033 is about 604.8979023123.

Adding to 221333033 its reverse (330333122), we get a palindrome (551666155).

The spelling of 221333033 in words is "two hundred twenty-one million, three hundred thirty-three thousand, thirty-three".