199518055 has 32 divisors (see below), whose sum is σ = 270397440. Its totient is φ = 140075520.

The previous prime is 199518049. The next prime is 199518061. The reversal of 199518055 is 550815991.

It is an interprime number because it is at equal distance from previous prime (199518049) and next prime (199518061).

It is not a de Polignac number, because 199518055 - 2²³ = 191129447 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 203727 + ... + 204703.

It is an arithmetic number, because the mean of its divisors is an integer number (8449920).

Almost surely, 2^199518055 is an apocalyptic number.

199518055 is a deficient number, since it is larger than the sum of its proper divisors (70879385).

199518055 is a wasteful number, since it uses less digits than its factorization.

199518055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119.

The product of its (nonzero) digits is 81000, while the sum is 43.

The square root of 199518055 is about 14125.0860174372. The cubic root of 199518055 is about 584.3334312468. Note that the first 3 decimals are identical.

The spelling of 199518055 in words is "one hundred ninety-nine million, five hundred eighteen thousand, fifty-five".