208185130 has 16 divisors (see below), whose sum is σ = 374935464. Its totient is φ = 83229120.

The previous prime is 208185073. The next prime is 208185143. The reversal of 208185130 is 31581802.

It can be written as a sum of positive squares in 4 ways, for example, as 143688169 + 64496961 = 11987^2 + 8031^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18964 + ... + 27856.

Almost surely, 2^208185130 is an apocalyptic number.

208185130 is a deficient number, since it is larger than the sum of its proper divisors (166750334).

208185130 is a wasteful number, since it uses less digits than its factorization.

208185130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 208185130 is about 14428.6219023162. The cubic root of 208185130 is about 592.6749458170.

The spelling of 208185130 in words is "two hundred eight million, one hundred eighty-five thousand, one hundred thirty".