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198919195 = 5211409461
BaseRepresentation
bin10111101101101…
…00010000011011
3111212022010211121
423312310100123
5401410403240
631423310111
74633533226
oct1366642033
9455263747
10198919195
11a2314a32
125674b337
1332299387
141c5c05bd
15126e404a
hexbdb441b

198919195 has 16 divisors (see below), whose sum is σ = 240942240. Its totient is φ = 157651200.

The previous prime is 198919187. The next prime is 198919213. The reversal of 198919195 is 591919891.

It is not a de Polignac number, because 198919195 - 23 = 198919187 is a prime.

It is a super-2 number, since 2×1989191952 = 79137692278896050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431265 + ... + 431725.

It is an arithmetic number, because the mean of its divisors is an integer number (15058890).

Almost surely, 2198919195 is an apocalyptic number.

198919195 is a deficient number, since it is larger than the sum of its proper divisors (42023045).

198919195 is a wasteful number, since it uses less digits than its factorization.

198919195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its digits is 262440, while the sum is 52.

The square root of 198919195 is about 14103.8716315769. The cubic root of 198919195 is about 583.7482133386.

The spelling of 198919195 in words is "one hundred ninety-eight million, nine hundred nineteen thousand, one hundred ninety-five".

Divisors: 1 5 211 409 461 1055 2045 2305 86299 97271 188549 431495 486355 942745 39783839 198919195