8221618 has 8 divisors (see below), whose sum is σ = 12363120. Its totient is φ = 4100580.

The previous prime is 8221597. The next prime is 8221621. The reversal of 8221618 is 8161228.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4068 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (1545390).

Almost surely, 2^8221618 is an apocalyptic number.

8221618 is a deficient number, since it is larger than the sum of its proper divisors (4141502).

8221618 is a wasteful number, since it uses less digits than its factorization.

8221618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232.

The product of its digits is 1536, while the sum is 28.

The square root of 8221618 is about 2867.3363946353. The cubic root of 8221618 is about 201.8300207151.

The spelling of 8221618 in words is "eight million, two hundred twenty-one thousand, six hundred eighteen".