218385153 has 20 divisors (see below), whose sum is σ = 372834880. Its totient is φ = 124791192.

The previous prime is 218385119. The next prime is 218385169. The reversal of 218385153 is 351583812.

It is not a de Polignac number, because 218385153 - 2¹⁰ = 218384129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218385103) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192013 + ... + 193146.

It is an arithmetic number, because the mean of its divisors is an integer number (18641744).

Almost surely, 2^218385153 is an apocalyptic number.

It is an amenable number.

218385153 is a deficient number, since it is larger than the sum of its proper divisors (154449727).

218385153 is an equidigital number, since it uses as much as digits as its factorization.

218385153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385178 (or 385169 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 218385153 is about 14777.8602307641. The cubic root of 218385153 is about 602.2003955677.

The spelling of 218385153 in words is "two hundred eighteen million, three hundred eighty-five thousand, one hundred fifty-three".