198091550 has 48 divisors (see below), whose sum is σ = 382689792. Its totient is φ = 76207200.

The previous prime is 198091529. The next prime is 198091573. The reversal of 198091550 is 55190891.

198091550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351569 + ... + 352131.

It is an arithmetic number, because the mean of its divisors is an integer number (7972704).

Almost surely, 2^198091550 is an apocalyptic number.

198091550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 14074×14075.

198091550 is a deficient number, since it is larger than the sum of its proper divisors (184598242).

198091550 is a wasteful number, since it uses less digits than its factorization.

198091550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 198091550 is about 14074.4999911187. The cubic root of 198091550 is about 582.9374856351.

The spelling of 198091550 in words is "one hundred ninety-eight million, ninety-one thousand, five hundred fifty".