8221506 has 16 divisors (see below), whose sum is σ = 17410464. Its totient is φ = 2579264.

The previous prime is 8221487. The next prime is 8221513. The reversal of 8221506 is 6051228.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 40200 + ... + 40403.

It is an arithmetic number, because the mean of its divisors is an integer number (1088154).

Almost surely, 2^8221506 is an apocalyptic number.

8221506 is an abundant number, since it is smaller than the sum of its proper divisors (9188958).

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

8221506 is a wasteful number, since it uses less digits than its factorization.

8221506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80625.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 8221506 is about 2867.3168642478. The cubic root of 8221506 is about 201.8291042262.

The spelling of 8221506 in words is "eight million, two hundred twenty-one thousand, five hundred six".