8221159 has 4 divisors (see below), whose sum is σ = 8226904. Its totient is φ = 8215416.

The previous prime is 8221139. The next prime is 8221177. The reversal of 8221159 is 9511228.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8221159 - 2²¹ = 6124007 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 (8221139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189 + ... + 4225.

It is an arithmetic number, because the mean of its divisors is an integer number (2056726).

Almost surely, 2^8221159 is an apocalyptic number.

8221159 is a deficient number, since it is larger than the sum of its proper divisors (5745).

8221159 is a wasteful number, since it uses less digits than its factorization.

8221159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744.

The product of its digits is 1440, while the sum is 28.

The square root of 8221159 is about 2867.2563540779. The cubic root of 8221159 is about 201.8262646944.

The spelling of 8221159 in words is "eight million, two hundred twenty-one thousand, one hundred fifty-nine".