8385221 has 8 divisors (see below), whose sum is σ = 9321984. Its totient is φ = 7490160.

The previous prime is 8385217. The next prime is 8385239. The reversal of 8385221 is 1225838.

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 8385221 - 2² = 8385217 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 (8385211) 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, 10001 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (1165248).

Almost surely, 2^8385221 is an apocalyptic number.

It is an amenable number.

8385221 is a deficient number, since it is larger than the sum of its proper divisors (936763).

8385221 is a wasteful number, since it uses less digits than its factorization.

8385221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20851.

The product of its digits is 3840, while the sum is 29.

The square root of 8385221 is about 2895.7246070716. The cubic root of 8385221 is about 203.1599845383.

The spelling of 8385221 in words is "eight million, three hundred eighty-five thousand, two hundred twenty-one".