8221163850 has 144 divisors (see below), whose sum is σ = 22966009248. Its totient is φ = 2186533440.

The previous prime is 8221163809. The next prime is 8221163869. The reversal of 8221163850 is 583611228.

It is a happy number.

8221163850 is a `hidden beast` number, since 8 + 2 + 2 + 11 + 638 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6645432 + ... + 6646668.

Almost surely, 2^8221163850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8221163850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11483004624).

8221163850 is an abundant number, since it is smaller than the sum of its proper divisors (14744845398).

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

8221163850 is a wasteful number, since it uses less digits than its factorization.

8221163850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 8221163850 is about 90670.6338899205. The cubic root of 8221163850 is about 2018.2630438290.

The spelling of 8221163850 in words is "eight billion, two hundred twenty-one million, one hundred sixty-three thousand, eight hundred fifty".