199189155 has 32 divisors (see below), whose sum is σ = 348323328. Its totient is φ = 96396800.

The previous prime is 199189129. The next prime is 199189157. The reversal of 199189155 is 551981991.

It is not a de Polignac number, because 199189155 - 2⁶ = 199189091 is a prime.

It is a super-2 number, since 2×199189155² = 79352638939228050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199189157) by changing a digit.

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, 145675 + ... + 147035.

It is an arithmetic number, because the mean of its divisors is an integer number (10885104).

Almost surely, 2^199189155 is an apocalyptic number.

199189155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199189155 is a deficient number, since it is larger than the sum of its proper divisors (149134173).

199189155 is a wasteful number, since it uses less digits than its factorization.

199189155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its digits is 145800, while the sum is 48.

The square root of 199189155 is about 14113.4388084549. The cubic root of 199189155 is about 584.0121688135.

The spelling of 199189155 in words is "one hundred ninety-nine million, one hundred eighty-nine thousand, one hundred fifty-five".