8533821 has 4 divisors (see below), whose sum is σ = 11378432. Its totient is φ = 5689212.

The previous prime is 8533799. The next prime is 8533829. The reversal of 8533821 is 1283358.

It is a happy number.

8533821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 8533821 - 2⁶ = 8533757 is a prime.

It is a super-2 number, since 2×8533821² = 145652201720082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8533829) 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, 1422301 + ... + 1422306.

It is an arithmetic number, because the mean of its divisors is an integer number (2844608).

Almost surely, 2^8533821 is an apocalyptic number.

It is an amenable number.

8533821 is a deficient number, since it is larger than the sum of its proper divisors (2844611).

8533821 is a wasteful number, since it uses less digits than its factorization.

8533821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844610.

The product of its digits is 5760, while the sum is 30.

The square root of 8533821 is about 2921.2704428040. The cubic root of 8533821 is about 204.3530746429.

The spelling of 8533821 in words is "eight million, five hundred thirty-three thousand, eight hundred twenty-one".