43131940028 has 6 divisors (see below), whose sum is σ = 75480895056. Its totient is φ = 21565970012.

The previous prime is 43131940021. The next prime is 43131940051. The reversal of 43131940028 is 82004913134.

43131940028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 43131940028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43131940021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5391492500 + ... + 5391492507.

It is an arithmetic number, because the mean of its divisors is an integer number (12580149176).

Almost surely, 2^43131940028 is an apocalyptic number.

It is an amenable number.

43131940028 is a deficient number, since it is larger than the sum of its proper divisors (32348955028).

43131940028 is a wasteful number, since it uses less digits than its factorization.

43131940028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10782985011 (or 10782985009 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 43131940028 in words is "forty-three billion, one hundred thirty-one million, nine hundred forty thousand, twenty-eight".