50015404721 has 4 divisors (see below), whose sum is σ = 51178553712. Its totient is φ = 48852255732.

The previous prime is 50015404717. The next prime is 50015404729. The reversal of 50015404721 is 12740451005.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12740451005 = 5 ⋅2548090201.

It is a cyclic number.

It is not a de Polignac number, because 50015404721 - 2² = 50015404717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50015404729) 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, 581574431 + ... + 581574516.

It is an arithmetic number, because the mean of its divisors is an integer number (12794638428).

Almost surely, 2^50015404721 is an apocalyptic number.

It is an amenable number.

50015404721 is a deficient number, since it is larger than the sum of its proper divisors (1163148991).

50015404721 is a wasteful number, since it uses less digits than its factorization.

50015404721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163148990.

The product of its (nonzero) digits is 5600, while the sum is 29.

Adding to 50015404721 its reverse (12740451005), we get a palindrome (62755855726).

The spelling of 50015404721 in words is "fifty billion, fifteen million, four hundred four thousand, seven hundred twenty-one".