43021330040 has 128 divisors (see below), whose sum is σ = 107784069120. Its totient is φ = 15347059200.

The previous prime is 43021330039. The next prime is 43021330043. The reversal of 43021330040 is 4003312034.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43021329994 and 43021330021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43021330043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11717405 + ... + 11721075.

It is an arithmetic number, because the mean of its divisors is an integer number (842063040).

Almost surely, 2^43021330040 is an apocalyptic number.

43021330040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43021330040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53892034560).

43021330040 is an abundant number, since it is smaller than the sum of its proper divisors (64762739080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43021330040 is a wasteful number, since it uses less digits than its factorization.

43021330040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 43021330040 its reverse (4003312034), we get a palindrome (47024642074).

The spelling of 43021330040 in words is "forty-three billion, twenty-one million, three hundred thirty thousand, forty".