199842151 has 6 divisors (see below), whose sum is σ = 206369952. Its totient is φ = 193319460.

The previous prime is 199842079. The next prime is 199842163. The reversal of 199842151 is 151248991.

It is not a de Polignac number, because 199842151 - 2¹⁷ = 199711079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199842751) 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 5 ways as a sum of consecutive naturals, for example, 77440 + ... + 79978.

It is an arithmetic number, because the mean of its divisors is an integer number (34394992).

Almost surely, 2^199842151 is an apocalyptic number.

199842151 is a deficient number, since it is larger than the sum of its proper divisors (6527801).

199842151 is an frugal number, since it uses more digits than its factorization.

199842151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109 (or 2570 counting only the distinct ones).

The product of its digits is 25920, while the sum is 40.

The square root of 199842151 is about 14136.5537172254. The cubic root of 199842151 is about 584.6496560574.

The spelling of 199842151 in words is "one hundred ninety-nine million, eight hundred forty-two thousand, one hundred fifty-one".