8223218 has 8 divisors (see below), whose sum is σ = 12457260. Its totient is φ = 4070800.

The previous prime is 8223217. The next prime is 8223251. The reversal of 8223218 is 8123228.

It can be written as a sum of positive squares in 2 ways, for example, as 7912969 + 310249 = 2813^2 + 557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8223217) 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, 20153 + ... + 20556.

Almost surely, 2^8223218 is an apocalyptic number.

8223218 is a deficient number, since it is larger than the sum of its proper divisors (4234042).

8223218 is a wasteful number, since it uses less digits than its factorization.

8223218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40812.

The product of its digits is 1536, while the sum is 26.

The square root of 8223218 is about 2867.6153856471. The cubic root of 8223218 is about 201.8431125050.

The spelling of 8223218 in words is "eight million, two hundred twenty-three thousand, two hundred eighteen".