218210444 has 12 divisors (see below), whose sum is σ = 385576464. Its totient is φ = 108045744.

The previous prime is 218210441. The next prime is 218210501. The reversal of 218210444 is 444012812.

218210444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218210441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264407 + ... + 265230.

It is an arithmetic number, because the mean of its divisors is an integer number (32131372).

Almost surely, 2^218210444 is an apocalyptic number.

It is an amenable number.

218210444 is a deficient number, since it is larger than the sum of its proper divisors (167366020).

218210444 is a wasteful number, since it uses less digits than its factorization.

218210444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529744 (or 529742 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 218210444 is about 14771.9478742649. The cubic root of 218210444 is about 602.0397651462.

The spelling of 218210444 in words is "two hundred eighteen million, two hundred ten thousand, four hundred forty-four".