43243017123 has 16 divisors (see below), whose sum is σ = 59044151936. Its totient is φ = 28136324160.

The previous prime is 43243017107. The next prime is 43243017131. The reversal of 43243017123 is 32171034234.

It is not a de Polignac number, because 43243017123 - 2⁴ = 43243017107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43243017173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36711 + ... + 296367.

It is an arithmetic number, because the mean of its divisors is an integer number (3690259496).

Almost surely, 2^43243017123 is an apocalyptic number.

43243017123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

43243017123 is a deficient number, since it is larger than the sum of its proper divisors (15801134813).

43243017123 is a wasteful number, since it uses less digits than its factorization.

43243017123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260994.

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 43243017123 in words is "forty-three billion, two hundred forty-three million, seventeen thousand, one hundred twenty-three".