199149915 has 32 divisors (see below), whose sum is σ = 330624000. Its totient is φ = 102286080.

The previous prime is 199149911. The next prime is 199149919. The reversal of 199149915 is 519941991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (199149911) and next prime (199149919).

It is not a de Polignac number, because 199149915 - 2² = 199149911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199149911) 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, 46536 + ... + 50634.

It is an arithmetic number, because the mean of its divisors is an integer number (10332000).

Almost surely, 2^199149915 is an apocalyptic number.

199149915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199149915 is a deficient number, since it is larger than the sum of its proper divisors (131474085).

199149915 is a wasteful number, since it uses less digits than its factorization.

199149915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227.

The product of its digits is 131220, while the sum is 48.

The square root of 199149915 is about 14112.0485755967. The cubic root of 199149915 is about 583.9738164201.

The spelling of 199149915 in words is "one hundred ninety-nine million, one hundred forty-nine thousand, nine hundred fifteen".