50020155621 has 24 divisors (see below), whose sum is σ = 72665552960. Its totient is φ = 33156133056.

The previous prime is 50020155571. The next prime is 50020155623. The reversal of 50020155621 is 12655102005.

50020155621 is a `hidden beast` number, since 5 + 0 + 0 + 20 + 15 + 5 + 621 = 666.

50020155621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-50020155621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50020155623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1107936 + ... + 1152198.

Almost surely, 2^50020155621 is an apocalyptic number.

It is an amenable number.

50020155621 is a deficient number, since it is larger than the sum of its proper divisors (22645397339).

50020155621 is a wasteful number, since it uses less digits than its factorization.

50020155621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44985 (or 44982 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 50020155621 its reverse (12655102005), we get a palindrome (62675257626).

The spelling of 50020155621 in words is "fifty billion, twenty million, one hundred fifty-five thousand, six hundred twenty-one".