199795155 has 32 divisors (see below), whose sum is σ = 377131008. Its totient is φ = 88387200.

The previous prime is 199795151. The next prime is 199795201. The reversal of 199795155 is 551597991.

It is not a de Polignac number, because 199795155 - 2² = 199795151 is a prime.

It is a super-2 number, since 2×199795155² = 79836207922948050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199795098 and 199795107.

It is not an unprimeable number, because it can be changed into a prime (199795151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27436 + ... + 33945.

It is an arithmetic number, because the mean of its divisors is an integer number (11785344).

Almost surely, 2^199795155 is an apocalyptic number.

199795155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199795155 is a deficient number, since it is larger than the sum of its proper divisors (177335853).

199795155 is a wasteful number, since it uses less digits than its factorization.

199795155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61427.

The product of its digits is 637875, while the sum is 51.

The square root of 199795155 is about 14134.8914038984. The cubic root of 199795155 is about 584.6038226347.

The spelling of 199795155 in words is "one hundred ninety-nine million, seven hundred ninety-five thousand, one hundred fifty-five".