218240044 has 12 divisors (see below), whose sum is σ = 416640168. Its totient is φ = 99200000.

The previous prime is 218240039. The next prime is 218240063. The reversal of 218240044 is 440042812.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2479957 + ... + 2480044.

It is an arithmetic number, because the mean of its divisors is an integer number (34720014).

Almost surely, 2^218240044 is an apocalyptic number.

It is an amenable number.

218240044 is a deficient number, since it is larger than the sum of its proper divisors (198400124).

218240044 is a wasteful number, since it uses less digits than its factorization.

218240044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960016 (or 4960014 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 218240044 is about 14772.9497393039. The cubic root of 218240044 is about 602.0669859199.

Adding to 218240044 its reverse (440042812), we get a palindrome (658282856).

The spelling of 218240044 in words is "two hundred eighteen million, two hundred forty thousand, forty-four".