50513528981 has 8 divisors (see below), whose sum is σ = 51894988344. Its totient is φ = 49132923840.

The previous prime is 50513528959. The next prime is 50513528999. The reversal of 50513528981 is 18982531505.

50513528981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35724780100 + 14788748881 = 189010^2 + 121609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50513528981 is a prime.

It is a super-2 number, since 2×50513528981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50513528911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92750 + ... + 331103.

It is an arithmetic number, because the mean of its divisors is an integer number (6486873543).

Almost surely, 2^50513528981 is an apocalyptic number.

It is an amenable number.

50513528981 is a deficient number, since it is larger than the sum of its proper divisors (1381459363).

50513528981 is a wasteful number, since it uses less digits than its factorization.

50513528981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427111.

The product of its (nonzero) digits is 432000, while the sum is 47.

The spelling of 50513528981 in words is "fifty billion, five hundred thirteen million, five hundred twenty-eight thousand, nine hundred eighty-one".