800216500 has 24 divisors (see below), whose sum is σ = 1747673928. Its totient is φ = 320086400.

The previous prime is 800216491. The next prime is 800216507. The reversal of 800216500 is 5612008.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 210018064 + 590198436 = 14492^2 + 24294^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800216507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799717 + ... + 800716.

It is an arithmetic number, because the mean of its divisors is an integer number (72819747).

Almost surely, 2^800216500 is an apocalyptic number.

It is an amenable number.

800216500 is an abundant number, since it is smaller than the sum of its proper divisors (947457428).

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

800216500 is a wasteful number, since it uses less digits than its factorization.

800216500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600452 (or 1600440 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 800216500 is about 28288.0982040151. The cubic root of 800216500 is about 928.4015011680.

Adding to 800216500 its reverse (5612008), we get a palindrome (805828508).

The spelling of 800216500 in words is "eight hundred million, two hundred sixteen thousand, five hundred".