199297131 has 16 divisors (see below), whose sum is σ = 296630400. Its totient is φ = 117976320.

The previous prime is 199297121. The next prime is 199297141. The reversal of 199297131 is 131792991.

It is an interprime number because it is at equal distance from previous prime (199297121) and next prime (199297141).

It is not a de Polignac number, because 199297131 - 2⁶ = 199297067 is a prime.

It is a super-2 number, since 2×199297131² = 79438692849662322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199297121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68806 + ... + 71643.

It is an arithmetic number, because the mean of its divisors is an integer number (18539400).

Almost surely, 2^199297131 is an apocalyptic number.

199297131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199297131 is a deficient number, since it is larger than the sum of its proper divisors (97333269).

199297131 is a wasteful number, since it uses less digits than its factorization.

199297131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140506.

The product of its digits is 30618, while the sum is 42.

The square root of 199297131 is about 14117.2635804535. The cubic root of 199297131 is about 584.1176764101.

The spelling of 199297131 in words is "one hundred ninety-nine million, two hundred ninety-seven thousand, one hundred thirty-one".