228321144065 has 24 divisors (see below), whose sum is σ = 323083699560. Its totient is φ = 154418358528.

The previous prime is 228321144059. The next prime is 228321144083. The reversal of 228321144065 is 560441123822.

It can be written as a sum of positive squares in 4 ways, for example, as 20377848001 + 207943296064 = 142751^2 + 456008^2 .

It is not a de Polignac number, because 228321144065 - 2³⁰ = 227247402241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6365150 + ... + 6400919.

It is an arithmetic number, because the mean of its divisors is an integer number (13461820815).

Almost surely, 2^228321144065 is an apocalyptic number.

It is an amenable number.

228321144065 is a deficient number, since it is larger than the sum of its proper divisors (94762555495).

228321144065 is a wasteful number, since it uses less digits than its factorization.

228321144065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12766161 (or 12766154 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

Adding to 228321144065 its reverse (560441123822), we get a palindrome (788762267887).

The spelling of 228321144065 in words is "two hundred twenty-eight billion, three hundred twenty-one million, one hundred forty-four thousand, sixty-five".