533221321 has 4 divisors (see below), whose sum is σ = 535612672. Its totient is φ = 530829972.

The previous prime is 533221307. The next prime is 533221331. The reversal of 533221321 is 123122335.

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 533221321 - 2⁷ = 533221193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 533221292 and 533221301.

It is not an unprimeable number, because it can be changed into a prime (533221331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195341 + ... + 1195786.

It is an arithmetic number, because the mean of its divisors is an integer number (133903168).

Almost surely, 2^533221321 is an apocalyptic number.

It is an amenable number.

533221321 is a deficient number, since it is larger than the sum of its proper divisors (2391351).

533221321 is a wasteful number, since it uses less digits than its factorization.

533221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391350.

The product of its digits is 1080, while the sum is 22.

The square root of 533221321 is about 23091.5855020828. The cubic root of 533221321 is about 810.9034886316.

Adding to 533221321 its reverse (123122335), we get a palindrome (656343656).

The spelling of 533221321 in words is "five hundred thirty-three million, two hundred twenty-one thousand, three hundred twenty-one".