8359221 has 32 divisors (see below), whose sum is σ = 13104000. Its totient is φ = 4693248.

The previous prime is 8359217. The next prime is 8359229. The reversal of 8359221 is 1229538.

8359221 = T₃₁₈ + T₃₁₉ + ... + T₄₃₄.

It is a happy number.

It is not a de Polignac number, because 8359221 - 2² = 8359217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8359229) 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, 21295 + ... + 21683.

It is an arithmetic number, because the mean of its divisors is an integer number (409500).

Almost surely, 2^8359221 is an apocalyptic number.

It is an amenable number.

8359221 is a deficient number, since it is larger than the sum of its proper divisors (4744779).

8359221 is a wasteful number, since it uses less digits than its factorization.

8359221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453.

The product of its digits is 4320, while the sum is 30.

The square root of 8359221 is about 2891.2317444300. The cubic root of 8359221 is about 202.9497881911.

The spelling of 8359221 in words is "eight million, three hundred fifty-nine thousand, two hundred twenty-one".