8221700 has 18 divisors (see below), whose sum is σ = 17841306. Its totient is φ = 3288640.

The previous prime is 8221669. The next prime is 8221721. The reversal of 8221700 is 71228.

It can be written as a sum of positive squares in 3 ways, for example, as 7744 + 8213956 = 88^2 + 2866^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41009 + ... + 41208.

Almost surely, 2^8221700 is an apocalyptic number.

It is an amenable number.

8221700 is an abundant number, since it is smaller than the sum of its proper divisors (9619606).

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

8221700 is a wasteful number, since it uses less digits than its factorization.

8221700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82231 (or 82224 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 8221700 is about 2867.3506935846. The cubic root of 8221700 is about 201.8306917106.

Adding to 8221700 its reverse (71228), we get a palindrome (8292928).

The spelling of 8221700 in words is "eight million, two hundred twenty-one thousand, seven hundred".