8221722 has 8 divisors (see below), whose sum is σ = 16443456. Its totient is φ = 2740572.

The previous prime is 8221721. The next prime is 8221739. The reversal of 8221722 is 2271228.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

8221722 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 8221692 and 8221701.

It is not an unprimeable number, because it can be changed into a prime (8221721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 685138 + ... + 685149.

It is an arithmetic number, because the mean of its divisors is an integer number (2055432).

Almost surely, 2^8221722 is an apocalyptic number.

8221722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8221722 is a wasteful number, since it uses less digits than its factorization.

8221722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370292.

The product of its digits is 896, while the sum is 24.

The square root of 8221722 is about 2867.3545298759. The cubic root of 8221722 is about 201.8308717331.

The spelling of 8221722 in words is "eight million, two hundred twenty-one thousand, seven hundred twenty-two".