185145218 has 16 divisors (see below), whose sum is σ = 284679360. Its totient is φ = 90273456.

The previous prime is 185145197. The next prime is 185145223. The reversal of 185145218 is 812541581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12473 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (17792460).

Almost surely, 2^185145218 is an apocalyptic number.

185145218 is a deficient number, since it is larger than the sum of its proper divisors (99534142).

185145218 is a wasteful number, since it uses less digits than its factorization.

185145218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10681.

The product of its digits is 12800, while the sum is 35.

The square root of 185145218 is about 13606.8077814012. The cubic root of 185145218 is about 569.9509735200.

Adding to 185145218 its reverse (812541581), we get a palindrome (997686799).

It can be divided in two parts, 18514 and 5218, that added together give a palindrome (23732).

The spelling of 185145218 in words is "one hundred eighty-five million, one hundred forty-five thousand, two hundred eighteen".