817222 has 24 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 337680.

The previous prime is 817211. The next prime is 817237. The reversal of 817222 is 222718.

It is a junction number, because it is equal to n+sod(n) for n = 817193 and 817202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2904 + ... + 3172.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2⁸¹⁷²²² is an apocalyptic number.

817222 is a deficient number, since it is larger than the sum of its proper divisors (660218).

817222 is a wasteful number, since it uses less digits than its factorization.

817222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 309 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 817222 is about 904.0033185780. The cubic root of 817222 is about 93.4931982431.

The spelling of 817222 in words is "eight hundred seventeen thousand, two hundred twenty-two".