199318031 has 8 divisors (see below), whose sum is σ = 218398464. Its totient is φ = 180397720.

The previous prime is 199317997. The next prime is 199318039. The reversal of 199318031 is 130813991.

199318031 = 423² + 424² + ... + 876².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199318031 - 2⁶ = 199317967 is a prime.

It is a super-2 number, since 2×199318031² = 79455354963433922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199317982 and 199318000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199318039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37415 + ... + 42408.

It is an arithmetic number, because the mean of its divisors is an integer number (27299808).

Almost surely, 2^199318031 is an apocalyptic number.

199318031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199318031 is a deficient number, since it is larger than the sum of its proper divisors (19080433).

199318031 is a wasteful number, since it uses less digits than its factorization.

199318031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80061.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 199318031 is about 14118.0037894881. The cubic root of 199318031 is about 584.1380942198.

The spelling of 199318031 in words is "one hundred ninety-nine million, three hundred eighteen thousand, thirty-one".