218305153 has 8 divisors (see below), whose sum is σ = 242055936. Its totient is φ = 195205200.

The previous prime is 218305151. The next prime is 218305159. The reversal of 218305153 is 351503812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218305153 - 2¹ = 218305151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218305151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162001 + ... + 163342.

It is an arithmetic number, because the mean of its divisors is an integer number (30256992).

Almost surely, 2^218305153 is an apocalyptic number.

It is an amenable number.

218305153 is a deficient number, since it is larger than the sum of its proper divisors (23750783).

218305153 is a wasteful number, since it uses less digits than its factorization.

218305153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325415.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 218305153 is about 14775.1532310159. The cubic root of 218305153 is about 602.1268528460.

Adding to 218305153 its reverse (351503812), we get a palindrome (569808965).

It can be divided in two parts, 218 and 305153, that added together give a triangular number (305371 = T₇₈₁).

The spelling of 218305153 in words is "two hundred eighteen million, three hundred five thousand, one hundred fifty-three".