199999056 has 20 divisors (see below), whose sum is σ = 516664352. Its totient is φ = 66666336.

The previous prime is 199999043. The next prime is 199999057. The reversal of 199999056 is 650999991.

It is a super-2 number, since 2×199999056² = 79999244801782272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199998987 and 199999005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999057) 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 3 ways as a sum of consecutive naturals, for example, 2083276 + ... + 2083371.

Almost surely, 2^199999056 is an apocalyptic number.

199999056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199999056 is an abundant number, since it is smaller than the sum of its proper divisors (316665296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199999056 is a wasteful number, since it uses less digits than its factorization.

199999056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166658 (or 4166652 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 57.

The square root of 199999056 is about 14142.1022482515. The cubic root of 199999056 is about 584.8026275502.

The spelling of 199999056 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, fifty-six".