8221710 has 128 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 1731072.

The previous prime is 8221669. The next prime is 8221721. The reversal of 8221710 is 171228.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174907 + ... + 174953.

It is an arithmetic number, because the mean of its divisors is an integer number (194400).

Almost surely, 2^8221710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8221710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12441600).

8221710 is an abundant number, since it is smaller than the sum of its proper divisors (16661490).

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

8221710 is a wasteful number, since it uses less digits than its factorization.

8221710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 8221710 is about 2867.3524373540. The cubic root of 8221710 is about 201.8307735391.

Adding to 8221710 its reverse (171228), we get a palindrome (8392938).

The spelling of 8221710 in words is "eight million, two hundred twenty-one thousand, seven hundred ten".