8221228618 has 8 divisors (see below), whose sum is σ = 12757078980. Its totient is φ = 3968868960.

The previous prime is 8221228607. The next prime is 8221228633. The reversal of 8221228618 is 8168221228.

It can be written as a sum of positive squares in 2 ways, for example, as 8004344089 + 216884529 = 89467^2 + 14727^2 .

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, 70872603 + ... + 70872718.

Almost surely, 2^8221228618 is an apocalyptic number.

8221228618 is a deficient number, since it is larger than the sum of its proper divisors (4535850362).

8221228618 is a wasteful number, since it uses less digits than its factorization.

8221228618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141745352.

The product of its digits is 49152, while the sum is 40.

The square root of 8221228618 is about 90670.9910500597. The cubic root of 8221228618 is about 2018.2683439105.

The spelling of 8221228618 in words is "eight billion, two hundred twenty-one million, two hundred twenty-eight thousand, six hundred eighteen".