198217822 has 8 divisors (see below), whose sum is σ = 324356472. Its totient is φ = 90099000.

The previous prime is 198217777. The next prime is 198217837. The reversal of 198217822 is 228712891.

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

It is a congruent number.

It is an unprimeable number.

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, 4504929 + ... + 4504972.

It is an arithmetic number, because the mean of its divisors is an integer number (40544559).

Almost surely, 2^198217822 is an apocalyptic number.

198217822 is a deficient number, since it is larger than the sum of its proper divisors (126138650).

198217822 is a wasteful number, since it uses less digits than its factorization.

198217822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009914.

The product of its digits is 32256, while the sum is 40.

The square root of 198217822 is about 14078.9851196739. The cubic root of 198217822 is about 583.0613223952.

The spelling of 198217822 in words is "one hundred ninety-eight million, two hundred seventeen thousand, eight hundred twenty-two".