218323044 has 36 divisors (see below), whose sum is σ = 584336844. Its totient is φ = 68493312.

The previous prime is 218323019. The next prime is 218323103. The reversal of 218323044 is 440323812.

It can be written as a sum of positive squares in 2 ways, for example, as 197964900 + 20358144 = 14070^2 + 4512^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 218322999 and 218323017.

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 11 ways as a sum of consecutive naturals, for example, 177757 + ... + 178980.

It is an arithmetic number, because the mean of its divisors is an integer number (16231579).

Almost surely, 2^218323044 is an apocalyptic number.

It is an amenable number.

218323044 is an abundant number, since it is smaller than the sum of its proper divisors (366013800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218323044 is a wasteful number, since it uses less digits than its factorization.

218323044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356764 (or 356759 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 218323044 is about 14775.7586607253. The cubic root of 218323044 is about 602.1433013160.

Adding to 218323044 its reverse (440323812), we get a palindrome (658646856).

The spelling of 218323044 in words is "two hundred eighteen million, three hundred twenty-three thousand, forty-four".