50021800 has 24 divisors (see below), whose sum is σ = 116301150. Its totient is φ = 20008640.

The previous prime is 50021779. The next prime is 50021801. The reversal of 50021800 is 812005.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 42850116 + 7171684 = 6546^2 + 2678^2 .

It is not an unprimeable number, because it can be changed into a prime (50021801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124855 + ... + 125254.

Almost surely, 2^50021800 is an apocalyptic number.

50021800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

50021800 is an abundant number, since it is smaller than the sum of its proper divisors (66279350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50021800 is a wasteful number, since it uses less digits than its factorization.

50021800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250125 (or 250116 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 50021800 is about 7072.6091366624. The cubic root of 50021800 is about 368.4566833424.

Adding to 50021800 its reverse (812005), we get a palindrome (50833805).

The spelling of 50021800 in words is "fifty million, twenty-one thousand, eight hundred".