8220317842 has 16 divisors (see below), whose sum is σ = 13613497632. Its totient is φ = 3691489120.

The previous prime is 8220317773. The next prime is 8220317851. The reversal of 8220317842 is 2487130228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249083 + ... + 2252734.

It is an arithmetic number, because the mean of its divisors is an integer number (850843602).

Almost surely, 2^8220317842 is an apocalyptic number.

8220317842 is a deficient number, since it is larger than the sum of its proper divisors (5393179790).

8220317842 is a wasteful number, since it uses less digits than its factorization.

8220317842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501913.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8220317842 is about 90665.9684887334. The cubic root of 8220317842 is about 2018.1938109204.

The spelling of 8220317842 in words is "eight billion, two hundred twenty million, three hundred seventeen thousand, eight hundred forty-two".