8373221 has 8 divisors (see below), whose sum is σ = 8584800. Its totient is φ = 8164080.

The previous prime is 8373217. The next prime is 8373223. The reversal of 8373221 is 1223738.

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 8373221 - 2² = 8373217 is a prime.

It is a super-2 number, since 2×8373221² = 140221659829682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8373223) 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, 7691 + ... + 8711.

It is an arithmetic number, because the mean of its divisors is an integer number (1073100).

Almost surely, 2^8373221 is an apocalyptic number.

It is an amenable number.

8373221 is a deficient number, since it is larger than the sum of its proper divisors (211579).

8373221 is a wasteful number, since it uses less digits than its factorization.

8373221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219.

The product of its digits is 2016, while the sum is 26.

The square root of 8373221 is about 2893.6518449876. The cubic root of 8373221 is about 203.0630249114.

Adding to 8373221 its reverse (1223738), we get a palindrome (9596959).

The spelling of 8373221 in words is "eight million, three hundred seventy-three thousand, two hundred twenty-one".