8087221 has 4 divisors (see below), whose sum is σ = 8105152. Its totient is φ = 8069292.

The previous prime is 8087207. The next prime is 8087239. The reversal of 8087221 is 1227808.

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 8087221 - 2¹¹ = 8085173 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8087221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8087281) 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, 8271 + ... + 9196.

It is an arithmetic number, because the mean of its divisors is an integer number (2026288).

Almost surely, 2^8087221 is an apocalyptic number.

It is an amenable number.

8087221 is a deficient number, since it is larger than the sum of its proper divisors (17931).

8087221 is a wasteful number, since it uses less digits than its factorization.

8087221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8087221 is about 2843.8039665209. The cubic root of 8087221 is about 200.7242160568.

The spelling of 8087221 in words is "eight million, eighty-seven thousand, two hundred twenty-one".