217340799 has 16 divisors (see below), whose sum is σ = 312686304. Its totient is φ = 133488000.

The previous prime is 217340779. The next prime is 217340807. The reversal of 217340799 is 997043712.

It is not a de Polignac number, because 217340799 - 2⁷ = 217340671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217340799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217340749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15949 + ... + 26249.

It is an arithmetic number, because the mean of its divisors is an integer number (19542894).

Almost surely, 2^217340799 is an apocalyptic number.

217340799 is a deficient number, since it is larger than the sum of its proper divisors (95345505).

217340799 is a wasteful number, since it uses less digits than its factorization.

217340799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 217340799 is about 14742.4827963271. The cubic root of 217340799 is about 601.2389205877.

The spelling of 217340799 in words is "two hundred seventeen million, three hundred forty thousand, seven hundred ninety-nine".