8539221999 has 32 divisors (see below), whose sum is σ = 14684567040. Its totient is φ = 4282992000.

The previous prime is 8539221997. The next prime is 8539222033. The reversal of 8539221999 is 9991229358.

It is not a de Polignac number, because 8539221999 - 2¹ = 8539221997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8539221997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 630652 + ... + 644049.

It is an arithmetic number, because the mean of its divisors is an integer number (458892720).

Almost surely, 2^8539221999 is an apocalyptic number.

8539221999 is a deficient number, since it is larger than the sum of its proper divisors (6145345041).

8539221999 is a wasteful number, since it uses less digits than its factorization.

8539221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274751.

The product of its digits is 3149280, while the sum is 57.

The square root of 8539221999 is about 92407.9109113500. The cubic root of 8539221999 is about 2043.9617678871.

The spelling of 8539221999 in words is "eight billion, five hundred thirty-nine million, two hundred twenty-one thousand, nine hundred ninety-nine".