43428721125 has 16 divisors (see below), whose sum is σ = 72265392576. Its totient is φ = 23161984400.

The previous prime is 43428721099. The next prime is 43428721201. The reversal of 43428721125 is 52112782434.

It is a happy number.

43428721125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43428721125 - 2¹² = 43428717029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57904587 + ... + 57905336.

It is an arithmetic number, because the mean of its divisors is an integer number (4516587036).

Almost surely, 2^43428721125 is an apocalyptic number.

It is an amenable number.

43428721125 is a deficient number, since it is larger than the sum of its proper divisors (28836671451).

43428721125 is a wasteful number, since it uses less digits than its factorization.

43428721125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115809941 (or 115809931 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The spelling of 43428721125 in words is "forty-three billion, four hundred twenty-eight million, seven hundred twenty-one thousand, one hundred twenty-five".