4404031021 has 16 divisors (see below), whose sum is σ = 4785803568. Its totient is φ = 4028544000.

The previous prime is 4404031019. The next prime is 4404031039. The reversal of 4404031021 is 1201304044.

It can be written as a sum of positive squares in 8 ways, for example, as 10329796 + 4393701225 = 3214^2 + 66285^2 .

It is not a de Polignac number, because 4404031021 - 2¹ = 4404031019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4404031021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4404031081) 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, 815751 + ... + 821131.

It is an arithmetic number, because the mean of its divisors is an integer number (299112723).

Almost surely, 2^4404031021 is an apocalyptic number.

It is an amenable number.

4404031021 is a deficient number, since it is larger than the sum of its proper divisors (381772547).

4404031021 is a wasteful number, since it uses less digits than its factorization.

4404031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4404031021 is about 66362.8738151084. The cubic root of 4404031021 is about 1639.1427977438.

Adding to 4404031021 its reverse (1201304044), we get a palindrome (5605335065).

The spelling of 4404031021 in words is "four billion, four hundred four million, thirty-one thousand, twenty-one".