218244244 has 6 divisors (see below), whose sum is σ = 381927434. Its totient is φ = 109122120.

The previous prime is 218244211. The next prime is 218244281. The reversal of 218244244 is 442442812.

It can be written as a sum of positive squares in only one way, i.e., 202720644 + 15523600 = 14238^2 + 3940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27280527 + ... + 27280534.

Almost surely, 2^218244244 is an apocalyptic number.

It is an amenable number.

218244244 is a deficient number, since it is larger than the sum of its proper divisors (163683190).

218244244 is a wasteful number, since it uses less digits than its factorization.

218244244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54561065 (or 54561063 counting only the distinct ones).

The product of its digits is 16384, while the sum is 31.

The square root of 218244244 is about 14773.0918903255. The cubic root of 218244244 is about 602.0708481276.

The spelling of 218244244 in words is "two hundred eighteen million, two hundred forty-four thousand, two hundred forty-four".