50424413521 has 4 divisors (see below), whose sum is σ = 50489985700. Its totient is φ = 50358841344.

The previous prime is 50424413509. The next prime is 50424413527. The reversal of 50424413521 is 12531442405.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12531442405 = 5 ⋅2506288481.

It can be written as a sum of positive squares in 2 ways, for example, as 40491500625 + 9932912896 = 201225^2 + 99664^2 .

It is a cyclic number.

It is not a de Polignac number, because 50424413521 - 2⁷ = 50424413393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50424413527) 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, 32784936 + ... + 32786473.

It is an arithmetic number, because the mean of its divisors is an integer number (12622496425).

Almost surely, 2^50424413521 is an apocalyptic number.

It is an amenable number.

50424413521 is a deficient number, since it is larger than the sum of its proper divisors (65572179).

50424413521 is an equidigital number, since it uses as much as digits as its factorization.

50424413521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65572178.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 50424413521 its reverse (12531442405), we get a palindrome (62955855926).

The spelling of 50424413521 in words is "fifty billion, four hundred twenty-four million, four hundred thirteen thousand, five hundred twenty-one".