50406021 has 12 divisors (see below), whose sum is σ = 74183148. Its totient is φ = 32969664.

The previous prime is 50406017. The next prime is 50406047. The reversal of 50406021 is 12060405.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38750625 + 11655396 = 6225^2 + 3414^2 .

It is not a de Polignac number, because 50406021 - 2² = 50406017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50405985 and 50406003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50406011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52360 + ... + 53313.

It is an arithmetic number, because the mean of its divisors is an integer number (6181929).

Almost surely, 2^50406021 is an apocalyptic number.

It is an amenable number.

50406021 is a deficient number, since it is larger than the sum of its proper divisors (23777127).

50406021 is a wasteful number, since it uses less digits than its factorization.

50406021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105732 (or 105729 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 50406021 is about 7099.7197832027. The cubic root of 50406021 is about 369.3976588606.

Adding to 50406021 its reverse (12060405), we get a palindrome (62466426).

The spelling of 50406021 in words is "fifty million, four hundred six thousand, twenty-one".