8220222 has 12 divisors (see below), whose sum is σ = 17810520. Its totient is φ = 2740068.

The previous prime is 8220221. The next prime is 8220229. The reversal of 8220222 is 2220228.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 456679 = 8220222 / (8 + 2 + 2 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 8220195 and 8220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 228322 + ... + 228357.

It is an arithmetic number, because the mean of its divisors is an integer number (1484210).

Almost surely, 2^8220222 is an apocalyptic number.

8220222 is an abundant number, since it is smaller than the sum of its proper divisors (9590298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8220222 is a wasteful number, since it uses less digits than its factorization.

8220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456687 (or 456684 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 8220222 is about 2867.0929528008. The cubic root of 8220222 is about 201.8185967409.

The spelling of 8220222 in words is "eight million, two hundred twenty thousand, two hundred twenty-two".