198409255 has 16 divisors (see below), whose sum is σ = 263299104. Its totient is φ = 142318080.

The previous prime is 198409241. The next prime is 198409273. The reversal of 198409255 is 552904891.

It is not a de Polignac number, because 198409255 - 2⁵ = 198409223 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 20694 + ... + 28723.

It is an arithmetic number, because the mean of its divisors is an integer number (16456194).

Almost surely, 2^198409255 is an apocalyptic number.

198409255 is a deficient number, since it is larger than the sum of its proper divisors (64889849).

198409255 is a wasteful number, since it uses less digits than its factorization.

198409255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49506.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 198409255 is about 14085.7820159195. The cubic root of 198409255 is about 583.2489632173.

The spelling of 198409255 in words is "one hundred ninety-eight million, four hundred nine thousand, two hundred fifty-five".