199550385 has 24 divisors (see below), whose sum is σ = 358700160. Its totient is φ = 106426224.

The previous prime is 199550359. The next prime is 199550389. The reversal of 199550385 is 583055991.

199550385 is a `hidden beast` number, since 1 + 99 + 550 + 3 + 8 + 5 = 666.

It is not a de Polignac number, because 199550385 - 2¹⁴ = 199534001 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199550385.

It is not an unprimeable number, because it can be changed into a prime (199550389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80905 + ... + 83334.

It is an arithmetic number, because the mean of its divisors is an integer number (14945840).

Almost surely, 2^199550385 is an apocalyptic number.

199550385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199550385 is a deficient number, since it is larger than the sum of its proper divisors (159149775).

199550385 is an equidigital number, since it uses as much as digits as its factorization.

199550385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164259 (or 164247 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The square root of 199550385 is about 14126.2303888900. The cubic root of 199550385 is about 584.3649914307.

The spelling of 199550385 in words is "one hundred ninety-nine million, five hundred fifty thousand, three hundred eighty-five".