208115193 has 32 divisors (see below), whose sum is σ = 328470912. Its totient is φ = 115545600.

The previous prime is 208115191. The next prime is 208115213. The reversal of 208115193 is 391511802.

It is not a de Polignac number, because 208115193 - 2¹ = 208115191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208115193.

It is not an unprimeable number, because it can be changed into a prime (208115191) 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 31 ways as a sum of consecutive naturals, for example, 57003 + ... + 60543.

It is an arithmetic number, because the mean of its divisors is an integer number (10264716).

Almost surely, 2^208115193 is an apocalyptic number.

It is an amenable number.

208115193 is a deficient number, since it is larger than the sum of its proper divisors (120355719).

208115193 is a wasteful number, since it uses less digits than its factorization.

208115193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 208115193 is about 14426.1981478143. The cubic root of 208115193 is about 592.6085713197.

Adding to 208115193 its reverse (391511802), we get a palindrome (599626995).

The spelling of 208115193 in words is "two hundred eight million, one hundred fifteen thousand, one hundred ninety-three".