2218328065 has 8 divisors (see below), whose sum is σ = 2668504680. Its totient is φ = 1770321792.

The previous prime is 2218328051. The next prime is 2218328087. The reversal of 2218328065 is 5608238122.

It can be written as a sum of positive squares in 4 ways, for example, as 823230864 + 1395097201 = 28692^2 + 37351^2 .

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 2218328065 - 2²⁷ = 2084110337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540334 + ... + 544423.

It is an arithmetic number, because the mean of its divisors is an integer number (333563085).

It is a Proth number, since it is equal to 33849 ⋅ 2¹⁶ + 1 and 33849 < 2¹⁶.

Almost surely, 2^2218328065 is an apocalyptic number.

It is an amenable number.

2218328065 is a deficient number, since it is larger than the sum of its proper divisors (450176615).

2218328065 is a wasteful number, since it uses less digits than its factorization.

2218328065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085171.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 2218328065 is about 47099.1301936671. The cubic root of 2218328065 is about 1304.1931791993.

The spelling of 2218328065 in words is "two billion, two hundred eighteen million, three hundred twenty-eight thousand, sixty-five".