217324965138 has 8 divisors (see below), whose sum is σ = 434649930288. Its totient is φ = 72441655044.

The previous prime is 217324965131. The next prime is 217324965139. The reversal of 217324965138 is 831569423712.

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

217324965138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (217324965131) 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, 18110413756 + ... + 18110413767.

It is an arithmetic number, because the mean of its divisors is an integer number (54331241286).

Almost surely, 2^217324965138 is an apocalyptic number.

217324965138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

217324965138 is a wasteful number, since it uses less digits than its factorization.

217324965138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36220827528.

The product of its digits is 2177280, while the sum is 51.

The spelling of 217324965138 in words is "two hundred seventeen billion, three hundred twenty-four million, nine hundred sixty-five thousand, one hundred thirty-eight".