43128488021 has 8 divisors (see below), whose sum is σ = 43945317504. Its totient is φ = 42311772880.

The previous prime is 43128488009. The next prime is 43128488027. The reversal of 43128488021 is 12088482134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43128488021 - 2²² = 43124293717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43128488021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43128488027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426160 + ... + 1456086.

It is an arithmetic number, because the mean of its divisors is an integer number (5493164688).

Almost surely, 2^43128488021 is an apocalyptic number.

It is an amenable number.

43128488021 is a deficient number, since it is larger than the sum of its proper divisors (816829483).

43128488021 is a wasteful number, since it uses less digits than its factorization.

43128488021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57171.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 43128488021 in words is "forty-three billion, one hundred twenty-eight million, four hundred eighty-eight thousand, twenty-one".