8380221 has 4 divisors (see below), whose sum is σ = 11173632. Its totient is φ = 5586812.

The previous prime is 8380213. The next prime is 8380223. The reversal of 8380221 is 1220838.

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 8380221 - 2³ = 8380213 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8380191 and 8380200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8380223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396701 + ... + 1396706.

It is an arithmetic number, because the mean of its divisors is an integer number (2793408).

Almost surely, 2^8380221 is an apocalyptic number.

It is an amenable number.

8380221 is a deficient number, since it is larger than the sum of its proper divisors (2793411).

8380221 is a wasteful number, since it uses less digits than its factorization.

8380221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793410.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8380221 is about 2894.8611365660. The cubic root of 8380221 is about 203.1195959430.

The spelling of 8380221 in words is "eight million, three hundred eighty thousand, two hundred twenty-one".