198821275 has 12 divisors (see below), whose sum is σ = 249661600. Its totient is φ = 157042080.

The previous prime is 198821261. The next prime is 198821281. The reversal of 198821275 is 572128891.

It is a happy number.

It is not a de Polignac number, because 198821275 - 2⁵ = 198821243 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48360 + ... + 52309.

Almost surely, 2^198821275 is an apocalyptic number.

198821275 is a deficient number, since it is larger than the sum of its proper divisors (50840325).

198821275 is a wasteful number, since it uses less digits than its factorization.

198821275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100758 (or 100753 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 198821275 is about 14100.3998170265. The cubic root of 198821275 is about 583.6524122825.

The spelling of 198821275 in words is "one hundred ninety-eight million, eight hundred twenty-one thousand, two hundred seventy-five".