4044243021 has 32 divisors (see below), whose sum is σ = 6647316480. Its totient is φ = 2129817024.

The previous prime is 4044242989. The next prime is 4044243097. The reversal of 4044243021 is 1203424404.

It is a happy number.

It is not a de Polignac number, because 4044243021 - 2⁵ = 4044242989 is a prime.

It is a super-2 number, since 2×4044243021² = 32711803225814412882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4044242982 and 4044243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4044243121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164020 + ... + 187058.

It is an arithmetic number, because the mean of its divisors is an integer number (207728640).

Almost surely, 2^4044243021 is an apocalyptic number.

It is an amenable number.

4044243021 is a deficient number, since it is larger than the sum of its proper divisors (2603073459).

4044243021 is a wasteful number, since it uses less digits than its factorization.

4044243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23705.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 4044243021 is about 63594.3631228429. The cubic root of 4044243021 is about 1593.2322236404.

Adding to 4044243021 its reverse (1203424404), we get a palindrome (5247667425).

The spelling of 4044243021 in words is "four billion, forty-four million, two hundred forty-three thousand, twenty-one".