520431076843 has 4 divisors (see below), whose sum is σ = 537219176128. Its totient is φ = 503642977560.

The previous prime is 520431076819. The next prime is 520431076849. The reversal of 520431076843 is 348670134025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520431076843 - 2³³ = 511841142251 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 520431076843.

It is not an unprimeable number, because it can be changed into a prime (520431076849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8394049596 + ... + 8394049657.

It is an arithmetic number, because the mean of its divisors is an integer number (134304794032).

Almost surely, 2^520431076843 is an apocalyptic number.

520431076843 is a deficient number, since it is larger than the sum of its proper divisors (16788099285).

520431076843 is a wasteful number, since it uses less digits than its factorization.

520431076843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16788099284.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 520431076843 in words is "five hundred twenty billion, four hundred thirty-one million, seventy-six thousand, eight hundred forty-three".