199903131 has 6 divisors (see below), whose sum is σ = 288748980. Its totient is φ = 133268748.

The previous prime is 199903117. The next prime is 199903141. The reversal of 199903131 is 131309991.

It is not a de Polignac number, because 199903131 - 2¹⁰ = 199902107 is a prime.

It is a super-2 number, since 2×199903131² = 79922523567206322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199903111) 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, 11105721 + ... + 11105738.

It is an arithmetic number, because the mean of its divisors is an integer number (48124830).

Almost surely, 2^199903131 is an apocalyptic number.

199903131 is a deficient number, since it is larger than the sum of its proper divisors (88845849).

199903131 is a wasteful number, since it uses less digits than its factorization.

199903131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211465 (or 22211462 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 199903131 is about 14138.7103725906. The cubic root of 199903131 is about 584.7091168371.

The spelling of 199903131 in words is "one hundred ninety-nine million, nine hundred three thousand, one hundred thirty-one".