43000330021 has 16 divisors (see below), whose sum is σ = 47597113728. Its totient is φ = 38518782400.

The previous prime is 43000330019. The next prime is 43000330063. The reversal of 43000330021 is 12003300034.

It is a cyclic number.

It is not a de Polignac number, because 43000330021 - 2¹ = 43000330019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43000329977 and 43000330004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43000330721) 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, 1451271 + ... + 1480603.

It is an arithmetic number, because the mean of its divisors is an integer number (2974819608).

Almost surely, 2^43000330021 is an apocalyptic number.

It is an amenable number.

43000330021 is a deficient number, since it is larger than the sum of its proper divisors (4596783707).

43000330021 is a wasteful number, since it uses less digits than its factorization.

43000330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31292.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 43000330021 its reverse (12003300034), we get a palindrome (55003630055).

The spelling of 43000330021 in words is "forty-three billion, three hundred thirty thousand, twenty-one".