8222857 has 4 divisors (see below), whose sum is σ = 8241156. Its totient is φ = 8204560.

The previous prime is 8222833. The next prime is 8222887. The reversal of 8222857 is 7582228.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4968441 + 3254416 = 2229^2 + 1804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8222857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8222807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8458 + ... + 9379.

It is an arithmetic number, because the mean of its divisors is an integer number (2060289).

Almost surely, 2^8222857 is an apocalyptic number.

It is an amenable number.

8222857 is a deficient number, since it is larger than the sum of its proper divisors (18299).

8222857 is a wasteful number, since it uses less digits than its factorization.

8222857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18298.

The product of its digits is 17920, while the sum is 34.

The square root of 8222857 is about 2867.5524406713. The cubic root of 8222857 is about 201.8401588183.

The spelling of 8222857 in words is "eight million, two hundred twenty-two thousand, eight hundred fifty-seven".