200131999 has 4 divisors (see below), whose sum is σ = 200297664. Its totient is φ = 199966336.

The previous prime is 200131991. The next prime is 200132011. The reversal of 200131999 is 999131002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999131002 = 2 ⋅499565501.

It is a cyclic number.

It is not a de Polignac number, because 200131999 - 2³ = 200131991 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 (200131991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81007 + ... + 83440.

It is an arithmetic number, because the mean of its divisors is an integer number (50074416).

Almost surely, 2^200131999 is an apocalyptic number.

200131999 is a deficient number, since it is larger than the sum of its proper divisors (165665).

200131999 is a wasteful number, since it uses less digits than its factorization.

200131999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165664.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 200131999 is about 14146.8017233578. The cubic root of 200131999 is about 584.9321751547.

The spelling of 200131999 in words is "two hundred million, one hundred thirty-one thousand, nine hundred ninety-nine".