217200308382 has 32 divisors (see below), whose sum is σ = 508070899200. Its totient is φ = 68589570744.

The previous prime is 217200308357. The next prime is 217200308417. The reversal of 217200308382 is 283803002712.

It is a happy number.

It is a super-2 number, since 2×217200308382² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105847078 + ... + 105849129.

It is an arithmetic number, because the mean of its divisors is an integer number (15877215600).

Almost surely, 2^217200308382 is an apocalyptic number.

217200308382 is an abundant number, since it is smaller than the sum of its proper divisors (290870590818).

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

217200308382 is a wasteful number, since it uses less digits than its factorization.

217200308382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211696237 (or 211696231 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 217200308382 in words is "two hundred seventeen billion, two hundred million, three hundred eight thousand, three hundred eighty-two".