199144585 has 16 divisors (see below), whose sum is σ = 249434640. Its totient is φ = 152488960.

The previous prime is 199144573. The next prime is 199144601. The reversal of 199144585 is 585441991.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11262736 + 187881849 = 3356^2 + 13707^2 .

It is not a de Polignac number, because 199144585 - 2¹⁷ = 199013513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1701 + ... + 20029.

It is an arithmetic number, because the mean of its divisors is an integer number (15589665).

Almost surely, 2^199144585 is an apocalyptic number.

It is an amenable number.

199144585 is a deficient number, since it is larger than the sum of its proper divisors (50290055).

199144585 is a wasteful number, since it uses less digits than its factorization.

199144585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428.

The product of its digits is 259200, while the sum is 46.

The square root of 199144585 is about 14111.8597286113. The cubic root of 199144585 is about 583.9686065957.

The spelling of 199144585 in words is "one hundred ninety-nine million, one hundred forty-four thousand, five hundred eighty-five".