218206303056 has 100 divisors (see below), whose sum is σ = 721774141792. Its totient is φ = 62344655424.

The previous prime is 218206302983. The next prime is 218206303061. The reversal of 218206303056 is 650303602812.

It is a happy number.

218206303056 is a `hidden beast` number, since 2 + 18 + 2 + 0 + 630 + 3 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×218206303056² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 218206303056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12017290 + ... + 12035433.

Almost surely, 2^218206303056 is an apocalyptic number.

It is an amenable number.

218206303056 is an abundant number, since it is smaller than the sum of its proper divisors (503567838736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218206303056 is a wasteful number, since it uses less digits than its factorization.

218206303056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24052750 (or 24052735 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 218206303056 its reverse (650303602812), we get a palindrome (868509905868).

The spelling of 218206303056 in words is "two hundred eighteen billion, two hundred six million, three hundred three thousand, fifty-six".