218131670216 has 32 divisors (see below), whose sum is σ = 411259788000. Its totient is φ = 108464057856.

The previous prime is 218131670213. The next prime is 218131670231. The reversal of 218131670216 is 612076131812.

It is a self number, because there is not a number n which added to its sum of digits gives 218131670216.

It is not an unprimeable number, because it can be changed into a prime (218131670213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948440 + ... + 1155768.

It is an arithmetic number, because the mean of its divisors is an integer number (12851868375).

Almost surely, 2^218131670216 is an apocalyptic number.

It is an amenable number.

218131670216 is a deficient number, since it is larger than the sum of its proper divisors (193128117784).

218131670216 is a wasteful number, since it uses less digits than its factorization.

218131670216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208061 (or 208057 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 218131670216 in words is "two hundred eighteen billion, one hundred thirty-one million, six hundred seventy thousand, two hundred sixteen".