50215405521021 has 16 divisors (see below), whose sum is σ = 72133494726720. Its totient is φ = 30889221143040.

The previous prime is 50215405520957. The next prime is 50215405521041. The reversal of 50215405521021 is 12012550451205.

It is not a de Polignac number, because 50215405521021 - 2⁶ = 50215405520957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50215405521041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261712660 + ... + 261904461.

It is an arithmetic number, because the mean of its divisors is an integer number (4508343420420).

Almost surely, 2^{50215405521021} is an apocalyptic number.

It is an amenable number.

50215405521021 is a deficient number, since it is larger than the sum of its proper divisors (21918089205699).

50215405521021 is a wasteful number, since it uses less digits than its factorization.

50215405521021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523619596.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 50215405521021 its reverse (12012550451205), we get a palindrome (62227955972226).

The spelling of 50215405521021 in words is "fifty trillion, two hundred fifteen billion, four hundred five million, five hundred twenty-one thousand, twenty-one".