50042218517 has 4 divisors (see below), whose sum is σ = 50054203116. Its totient is φ = 50030233920.

The previous prime is 50042218481. The next prime is 50042218529. The reversal of 50042218517 is 71581224005.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26255017156 + 23787201361 = 162034^2 + 154231^2 .

It is a cyclic number.

It is not a de Polignac number, because 50042218517 - 2¹⁸ = 50041956373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50042218117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5986034 + ... + 5994387.

It is an arithmetic number, because the mean of its divisors is an integer number (12513550779).

Almost surely, 2^50042218517 is an apocalyptic number.

It is an amenable number.

50042218517 is a deficient number, since it is larger than the sum of its proper divisors (11984599).

50042218517 is a wasteful number, since it uses less digits than its factorization.

50042218517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11984598.

The product of its (nonzero) digits is 22400, while the sum is 35.

The spelling of 50042218517 in words is "fifty billion, forty-two million, two hundred eighteen thousand, five hundred seventeen".