218325161 has 8 divisors (see below), whose sum is σ = 222705984. Its totient is φ = 213970320.

The previous prime is 218325091. The next prime is 218325167. The reversal of 218325161 is 161523812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218325161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218325167) by changing a digit.

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, 10940 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (27838248).

Almost surely, 2^218325161 is an apocalyptic number.

It is an amenable number.

218325161 is a deficient number, since it is larger than the sum of its proper divisors (4380823).

218325161 is a wasteful number, since it uses less digits than its factorization.

218325161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12991.

The product of its digits is 2880, while the sum is 29.

The square root of 218325161 is about 14775.8302981592. The cubic root of 218325161 is about 602.1452475653.

Adding to 218325161 its reverse (161523812), we get a palindrome (379848973).

The spelling of 218325161 in words is "two hundred eighteen million, three hundred twenty-five thousand, one hundred sixty-one".