218380075 has 12 divisors (see below), whose sum is σ = 271278520. Its totient is φ = 174389760.

The previous prime is 218380073. The next prime is 218380081. The reversal of 218380075 is 570083812.

It is not a de Polignac number, because 218380075 - 2¹ = 218380073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218380075.

It is not an unprimeable number, because it can be changed into a prime (218380073) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6856 + ... + 21994.

Almost surely, 2^218380075 is an apocalyptic number.

218380075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

218380075 is a deficient number, since it is larger than the sum of its proper divisors (52898445).

218380075 is a wasteful number, since it uses less digits than its factorization.

218380075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15726 (or 15721 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 218380075 is about 14777.6884186939. The cubic root of 218380075 is about 602.1957279773.

The spelling of 218380075 in words is "two hundred eighteen million, three hundred eighty thousand, seventy-five".