50131252521 has 12 divisors (see below), whose sum is σ = 82756353472. Its totient is φ = 28646429976.

The previous prime is 50131252513. The next prime is 50131252531. The reversal of 50131252521 is 12525213105.

50131252521 is a `hidden beast` number, since 5 + 0 + 13 + 125 + 2 + 521 = 666.

It is not a de Polignac number, because 50131252521 - 2³ = 50131252513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50131252531) 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 11 ways as a sum of consecutive naturals, for example, 397867021 + ... + 397867146.

Almost surely, 2^50131252521 is an apocalyptic number.

It is an amenable number.

50131252521 is a deficient number, since it is larger than the sum of its proper divisors (32625100951).

50131252521 is a wasteful number, since it uses less digits than its factorization.

50131252521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795734180 (or 795734177 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 50131252521 its reverse (12525213105), we get a palindrome (62656465626).

The spelling of 50131252521 in words is "fifty billion, one hundred thirty-one million, two hundred fifty-two thousand, five hundred twenty-one".