8307221 has 8 divisors (see below), whose sum is σ = 9055200. Its totient is φ = 7574832.

The previous prime is 8307193. The next prime is 8307223. The reversal of 8307221 is 1227038.

8307221 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 8307221 - 2⁶ = 8307157 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 (8307223) 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, 2771 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (1131900).

Almost surely, 2^8307221 is an apocalyptic number.

It is an amenable number.

8307221 is a deficient number, since it is larger than the sum of its proper divisors (747979).

8307221 is a wasteful number, since it uses less digits than its factorization.

8307221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7795.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 8307221 is about 2882.2250085654. The cubic root of 8307221 is about 202.5280843028.

The spelling of 8307221 in words is "eight million, three hundred seven thousand, two hundred twenty-one".