199840331 has 4 divisors (see below), whose sum is σ = 203116464. Its totient is φ = 196564200.

The previous prime is 199840301. The next prime is 199840339. The reversal of 199840331 is 133048991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133048991 = 61 ⋅2181131.

It is a cyclic number.

It is not a de Polignac number, because 199840331 - 2¹⁸ = 199578187 is a prime.

It is a super-2 number, since 2×199840331² = 79872315788379122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199840339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637975 + ... + 1638096.

It is an arithmetic number, because the mean of its divisors is an integer number (50779116).

Almost surely, 2^199840331 is an apocalyptic number.

199840331 is a deficient number, since it is larger than the sum of its proper divisors (3276133).

199840331 is an equidigital number, since it uses as much as digits as its factorization.

199840331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276132.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 199840331 is about 14136.4893449541. The cubic root of 199840331 is about 584.6478812140.

The spelling of 199840331 in words is "one hundred ninety-nine million, eight hundred forty thousand, three hundred thirty-one".