218055368 has 8 divisors (see below), whose sum is σ = 408853830. Its totient is φ = 109027680.

The previous prime is 218055353. The next prime is 218055371. The reversal of 218055368 is 863550812.

It can be written as a sum of positive squares in only one way, i.e., 122367844 + 95687524 = 11062^2 + 9782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13628453 + ... + 13628468.

Almost surely, 2^218055368 is an apocalyptic number.

It is an amenable number.

218055368 is a deficient number, since it is larger than the sum of its proper divisors (190798462).

218055368 is a wasteful number, since it uses less digits than its factorization.

218055368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27256927 (or 27256923 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 218055368 is about 14766.6979382664. The cubic root of 218055368 is about 601.8971137952.

The spelling of 218055368 in words is "two hundred eighteen million, fifty-five thousand, three hundred sixty-eight".