50521263521 has 2 divisors, whose sum is σ = 50521263522. Its totient is φ = 50521263520.

The previous prime is 50521263509. The next prime is 50521263553. The reversal of 50521263521 is 12536212505.

50521263521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (50521263553) can be obtained adding 50521263521 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49622463121 + 898800400 = 222761^2 + 29980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50521263521 is a prime.

It is not a weakly prime, because it can be changed into another prime (50521260521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25260631760 + 25260631761.

It is an arithmetic number, because the mean of its divisors is an integer number (25260631761).

Almost surely, 2^50521263521 is an apocalyptic number.

It is an amenable number.

50521263521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50521263521 is an equidigital number, since it uses as much as digits as its factorization.

50521263521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 50521263521 in words is "fifty billion, five hundred twenty-one million, two hundred sixty-three thousand, five hundred twenty-one".