217828287008 has 12 divisors (see below), whose sum is σ = 428849440110. Its totient is φ = 108914143488.

The previous prime is 217828286993. The next prime is 217828287049. The reversal of 217828287008 is 800782828712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 173312350864 + 44515936144 = 416308^2 + 210988^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403566953 + ... + 3403567016.

Almost surely, 2^217828287008 is an apocalyptic number.

It is an amenable number.

217828287008 is a deficient number, since it is larger than the sum of its proper divisors (211021153102).

217828287008 is an equidigital number, since it uses as much as digits as its factorization.

217828287008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807133979 (or 6807133971 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 53.

The spelling of 217828287008 in words is "two hundred seventeen billion, eight hundred twenty-eight million, two hundred eighty-seven thousand, eight".