217979089316 has 12 divisors (see below), whose sum is σ = 381500381388. Its totient is φ = 108978980352.

The previous prime is 217979089313. The next prime is 217979089319. The reversal of 217979089316 is 613980979712.

It is an interprime number because it is at equal distance from previous prime (217979089313) and next prime (217979089319).

It can be written as a sum of positive squares in 2 ways, for example, as 2733198400 + 215245890916 = 52280^2 + 463946^2 .

It is not an unprimeable number, because it can be changed into a prime (217979089313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594561 + ... + 2677256.

It is an arithmetic number, because the mean of its divisors is an integer number (31791698449).

Almost surely, 2^217979089316 is an apocalyptic number.

It is an amenable number.

217979089316 is a deficient number, since it is larger than the sum of its proper divisors (163521292072).

217979089316 is a wasteful number, since it uses less digits than its factorization.

217979089316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282158 (or 5282156 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 62.

The spelling of 217979089316 in words is "two hundred seventeen billion, nine hundred seventy-nine million, eighty-nine thousand, three hundred sixteen".