50215021 has 8 divisors (see below), whose sum is σ = 51284664. Its totient is φ = 49155840.

The previous prime is 50214977. The next prime is 50215073. The reversal of 50215021 is 12051205.

It can be written as a sum of positive squares in 4 ways, for example, as 21206025 + 29008996 = 4605^2 + 5386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50215021 - 2⁷ = 50214893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50214986 and 50215004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50215091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7491 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (6410583).

Almost surely, 2^50215021 is an apocalyptic number.

It is an amenable number.

50215021 is a deficient number, since it is larger than the sum of its proper divisors (1069643).

50215021 is a wasteful number, since it uses less digits than its factorization.

50215021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 50215021 is about 7086.2557814406. The cubic root of 50215021 is about 368.9304907470.

Adding to 50215021 its reverse (12051205), we get a palindrome (62266226).

The spelling of 50215021 in words is "fifty million, two hundred fifteen thousand, twenty-one".