8288221 has 4 divisors (see below), whose sum is σ = 8317792. Its totient is φ = 8258652.

The previous prime is 8288213. The next prime is 8288249. The reversal of 8288221 is 1228828.

8288221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8288221 - 2³ = 8288213 is a prime.

It is a Duffinian number.

8288221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8288321) 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, 14361 + ... + 14926.

It is an arithmetic number, because the mean of its divisors is an integer number (2079448).

Almost surely, 2^8288221 is an apocalyptic number.

It is an amenable number.

8288221 is a deficient number, since it is larger than the sum of its proper divisors (29571).

8288221 is a wasteful number, since it uses less digits than its factorization.

8288221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29570.

The product of its digits is 4096, while the sum is 31.

The square root of 8288221 is about 2878.9270570822. The cubic root of 8288221 is about 202.3735612666.

The spelling of 8288221 in words is "eight million, two hundred eighty-eight thousand, two hundred twenty-one".