8220686223 has 16 divisors (see below), whose sum is σ = 11124366336. Its totient is φ = 5398858080.

The previous prime is 8220686213. The next prime is 8220686267. The reversal of 8220686223 is 3226860228.

It is a Cunningham number, because it is equal to 90668²-1.

It is not a de Polignac number, because 8220686223 - 2¹⁰ = 8220685199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220686213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256890 + ... + 287112.

It is an arithmetic number, because the mean of its divisors is an integer number (695272896).

Almost surely, 2^8220686223 is an apocalyptic number.

8220686223 is a deficient number, since it is larger than the sum of its proper divisors (2903680113).

8220686223 is a wasteful number, since it uses less digits than its factorization.

8220686223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31574.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 8220686223 is about 90667.9999944854. Note that the first 5 decimals coincide. The cubic root of 8220686223 is about 2018.2239578954.

The spelling of 8220686223 in words is "eight billion, two hundred twenty million, six hundred eighty-six thousand, two hundred twenty-three".