8221512 has 48 divisors (see below), whose sum is σ = 22267440. Its totient is φ = 2528448.

The previous prime is 8221487. The next prime is 8221513. The reversal of 8221512 is 2151228.

It is a happy number.

It is a super-2 number, since 2×8221512² = 135186519132288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8221513) 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 11 ways as a sum of consecutive naturals, for example, 3043 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (463905).

Almost surely, 2^8221512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8221512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11133720).

8221512 is an abundant number, since it is smaller than the sum of its proper divisors (14045928).

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

8221512 is a wasteful number, since it uses less digits than its factorization.

8221512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2045 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 8221512 is about 2867.3179105220. The cubic root of 8221512 is about 201.8291533240.

The spelling of 8221512 in words is "eight million, two hundred twenty-one thousand, five hundred twelve".