50987900521 has 2 divisors, whose sum is σ = 50987900522. Its totient is φ = 50987900520.

The previous prime is 50987900519. The next prime is 50987900531. The reversal of 50987900521 is 12500978905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50382740521 + 605160000 = 224461^2 + 24600^2 .

It is a cyclic number.

It is not a de Polignac number, because 50987900521 - 2¹ = 50987900519 is a prime.

Together with 50987900519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50987900531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25493950260 + 25493950261.

It is an arithmetic number, because the mean of its divisors is an integer number (25493950261).

Almost surely, 2^50987900521 is an apocalyptic number.

It is an amenable number.

50987900521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50987900521 is an equidigital number, since it uses as much as digits as its factorization.

50987900521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 50987900521 in words is "fifty billion, nine hundred eighty-seven million, nine hundred thousand, five hundred twenty-one".