4304031221 has 16 divisors (see below), whose sum is σ = 5200041600. Its totient is φ = 3479977728.

The previous prime is 4304031217. The next prime is 4304031301. The reversal of 4304031221 is 1221304034.

It is a cyclic number.

It is not a de Polignac number, because 4304031221 - 2² = 4304031217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4304031193 and 4304031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4304031521) 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, 38456 + ... + 100433.

It is an arithmetic number, because the mean of its divisors is an integer number (325002600).

Almost surely, 2^4304031221 is an apocalyptic number.

It is an amenable number.

4304031221 is a deficient number, since it is larger than the sum of its proper divisors (896010379).

4304031221 is a wasteful number, since it uses less digits than its factorization.

4304031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139148.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4304031221 is about 65605.1158142412. The cubic root of 4304031221 is about 1626.6413359725.

Adding to 4304031221 its reverse (1221304034), we get a palindrome (5525335255).

The spelling of 4304031221 in words is "four billion, three hundred four million, thirty-one thousand, two hundred twenty-one".