218255368 has 16 divisors (see below), whose sum is σ = 409405500. Its totient is φ = 109080576.

The previous prime is 218255353. The next prime is 218255371. The reversal of 218255368 is 863552812.

It can be written as a sum of positive squares in 2 ways, for example, as 217916644 + 338724 = 14762^2 + 582^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218255368.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21048 + ... + 29656.

Almost surely, 2^218255368 is an apocalyptic number.

It is an amenable number.

218255368 is a deficient number, since it is larger than the sum of its proper divisors (191150132).

218255368 is a wasteful number, since it uses less digits than its factorization.

218255368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11784 (or 11780 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 218255368 is about 14773.4683808509. The cubic root of 218255368 is about 602.0810772211.

The spelling of 218255368 in words is "two hundred eighteen million, two hundred fifty-five thousand, three hundred sixty-eight".