218325145 has 8 divisors (see below), whose sum is σ = 262099656. Its totient is φ = 174587136.

The previous prime is 218325091. The next prime is 218325167. The reversal of 218325145 is 541523812.

It can be written as a sum of positive squares in 4 ways, for example, as 45481536 + 172843609 = 6744^2 + 13147^2 .

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 218325145 - 2⁷ = 218325017 is a prime.

It is a Duffinian number.

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, 6459 + ... + 21871.

It is an arithmetic number, because the mean of its divisors is an integer number (32762457).

Almost surely, 2^218325145 is an apocalyptic number.

It is an amenable number.

218325145 is a deficient number, since it is larger than the sum of its proper divisors (43774511).

218325145 is a wasteful number, since it uses less digits than its factorization.

218325145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18251.

The product of its digits is 9600, while the sum is 31.

The square root of 218325145 is about 14775.8297567345. The cubic root of 218325145 is about 602.1452328559.

Adding to 218325145 its reverse (541523812), we get a palindrome (759848957).

The spelling of 218325145 in words is "two hundred eighteen million, three hundred twenty-five thousand, one hundred forty-five".