4033221 has 4 divisors (see below), whose sum is σ = 5377632. Its totient is φ = 2688812.

The previous prime is 4033207. The next prime is 4033229. The reversal of 4033221 is 1223304.

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 4033221 - 2⁶ = 4033157 is a prime.

It is a super-4 number, since 4×4033221⁴ (a number of 28 digits) contains 4444 as substring.

It is a D-number.

4033221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4033221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4033229) 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, 672201 + ... + 672206.

It is an arithmetic number, because the mean of its divisors is an integer number (1344408).

Almost surely, 2^4033221 is an apocalyptic number.

It is an amenable number.

4033221 is a deficient number, since it is larger than the sum of its proper divisors (1344411).

4033221 is a wasteful number, since it uses less digits than its factorization.

4033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344410.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 4033221 is about 2008.2880769451. The cubic root of 4033221 is about 159.1783529273.

Adding to 4033221 its reverse (1223304), we get a palindrome (5256525).

The spelling of 4033221 in words is "four million, thirty-three thousand, two hundred twenty-one".