217671002002 has 8 divisors (see below), whose sum is σ = 331859068812. Its totient is φ = 107051312400.

The previous prime is 217671001991. The next prime is 217671002023. The reversal of 217671002002 is 200200176712.

It can be written as a sum of positive squares in 2 ways, for example, as 194797766881 + 22873235121 = 441359^2 + 151239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×217671002002² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892094149 + ... + 892094392.

Almost surely, 2^217671002002 is an apocalyptic number.

217671002002 is a deficient number, since it is larger than the sum of its proper divisors (114188066810).

217671002002 is a wasteful number, since it uses less digits than its factorization.

217671002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784188604.

The product of its (nonzero) digits is 2352, while the sum is 28.

Adding to 217671002002 its reverse (200200176712), we get a palindrome (417871178714).

The spelling of 217671002002 in words is "two hundred seventeen billion, six hundred seventy-one million, two thousand, two".