4331221 has 8 divisors (see below), whose sum is σ = 4582080. Its totient is φ = 4082688.

The previous prime is 4331219. The next prime is 4331251. The reversal of 4331221 is 1221334.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4331221 - 2¹ = 4331219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4331195 and 4331204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4331251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4440 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (572760).

Almost surely, 2^4331221 is an apocalyptic number.

It is an amenable number.

4331221 is a deficient number, since it is larger than the sum of its proper divisors (250859).

4331221 is a wasteful number, since it uses less digits than its factorization.

4331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its digits is 144, while the sum is 16.

The square root of 4331221 is about 2081.1585715654. The cubic root of 4331221 is about 163.0059465631.

Adding to 4331221 its reverse (1221334), we get a palindrome (5552555).

The spelling of 4331221 in words is "four million, three hundred thirty-one thousand, two hundred twenty-one".