50005042821 has 32 divisors (see below), whose sum is σ = 78189936000. Its totient is φ = 31497341184.

The previous prime is 50005042817. The next prime is 50005042883. The reversal of 50005042821 is 12824050005.

It is a happy number.

It is not a de Polignac number, because 50005042821 - 2² = 50005042817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50005042891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60685 + ... + 322013.

It is an arithmetic number, because the mean of its divisors is an integer number (2443435500).

Almost surely, 2^50005042821 is an apocalyptic number.

It is an amenable number.

50005042821 is a deficient number, since it is larger than the sum of its proper divisors (28184893179).

50005042821 is a wasteful number, since it uses less digits than its factorization.

50005042821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261730 (or 261724 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 50005042821 its reverse (12824050005), we get a palindrome (62829092826).

The spelling of 50005042821 in words is "fifty billion, five million, forty-two thousand, eight hundred twenty-one".