8221843 has 4 divisors (see below), whose sum is σ = 9396400. Its totient is φ = 7047288.

The previous prime is 8221841. The next prime is 8221847. The reversal of 8221843 is 3481228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8221843 - 2¹ = 8221841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221841) 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, 587268 + ... + 587281.

It is an arithmetic number, because the mean of its divisors is an integer number (2349100).

Almost surely, 2^8221843 is an apocalyptic number.

8221843 is a deficient number, since it is larger than the sum of its proper divisors (1174557).

8221843 is a wasteful number, since it uses less digits than its factorization.

8221843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174556.

The product of its digits is 3072, while the sum is 28.

The square root of 8221843 is about 2867.3756293866. The cubic root of 8221843 is about 201.8318618507.

The spelling of 8221843 in words is "eight million, two hundred twenty-one thousand, eight hundred forty-three".