218313475 has 12 divisors (see below), whose sum is σ = 271434760. Its totient is φ = 174182400.

The previous prime is 218313467. The next prime is 218313497. The reversal of 218313475 is 574313812.

It is not a de Polignac number, because 218313475 - 2³ = 218313467 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 218313475.

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 11 ways as a sum of consecutive naturals, for example, 2046 + ... + 20995.

Almost surely, 2^218313475 is an apocalyptic number.

218313475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

218313475 is a deficient number, since it is larger than the sum of its proper divisors (53121285).

218313475 is a wasteful number, since it uses less digits than its factorization.

218313475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23430 (or 23425 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 218313475 is about 14775.4348497768. The cubic root of 218313475 is about 602.1345039649.

The spelling of 218313475 in words is "two hundred eighteen million, three hundred thirteen thousand, four hundred seventy-five".