8539356221 has 8 divisors (see below), whose sum is σ = 9542873088. Its totient is φ = 7573708000.

The previous prime is 8539356191. The next prime is 8539356227. The reversal of 8539356221 is 1226539358.

8539356221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 8539356221 - 2¹⁸ = 8539094077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8539356227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9466685 + ... + 9467586.

It is an arithmetic number, because the mean of its divisors is an integer number (1192859136).

Almost surely, 2^8539356221 is an apocalyptic number.

It is an amenable number.

8539356221 is a deficient number, since it is larger than the sum of its proper divisors (1003516867).

8539356221 is a wasteful number, since it uses less digits than its factorization.

8539356221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18934323.

The product of its digits is 388800, while the sum is 44.

The square root of 8539356221 is about 92408.6371558417. The cubic root of 8539356221 is about 2043.9724770281.

The spelling of 8539356221 in words is "eight billion, five hundred thirty-nine million, three hundred fifty-six thousand, two hundred twenty-one".