43047512123 has 20 divisors (see below), whose sum is σ = 54116665200. Its totient is φ = 33543436080.

The previous prime is 43047512117. The next prime is 43047512147. The reversal of 43047512123 is 32121574034.

It is not a de Polignac number, because 43047512123 - 2⁴ = 43047512107 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

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 43047512123.

It is not an unprimeable number, because it can be changed into a prime (43047512923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107528 + ... + 312501.

It is an arithmetic number, because the mean of its divisors is an integer number (2705833260).

Almost surely, 2^43047512123 is an apocalyptic number.

43047512123 is a deficient number, since it is larger than the sum of its proper divisors (11069153077).

43047512123 is an frugal number, since it uses more digits than its factorization.

43047512123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420080 (or 420047 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 43047512123 in words is "forty-three billion, forty-seven million, five hundred twelve thousand, one hundred twenty-three".