4533221 has 16 divisors (see below), whose sum is σ = 5712768. Its totient is φ = 3494400.

The previous prime is 4533209. The next prime is 4533239. The reversal of 4533221 is 1223354.

It is a happy number.

It is not a de Polignac number, because 4533221 - 2¹⁰ = 4532197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4533193 and 4533202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4533241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8441 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (357048).

Almost surely, 2^4533221 is an apocalyptic number.

It is an amenable number.

4533221 is a deficient number, since it is larger than the sum of its proper divisors (1179547).

4533221 is a wasteful number, since it uses less digits than its factorization.

4533221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 720, while the sum is 20.

The square root of 4533221 is about 2129.1362098278. The cubic root of 4533221 is about 165.5016383405.

Adding to 4533221 its reverse (1223354), we get a palindrome (5756575).

The spelling of 4533221 in words is "four million, five hundred thirty-three thousand, two hundred twenty-one".