216317753 has 4 divisors (see below), whose sum is σ = 217769700. Its totient is φ = 214865808.

The previous prime is 216317749. The next prime is 216317771. The reversal of 216317753 is 357713612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26759929 + 189557824 = 5173^2 + 13768^2 .

It is a cyclic number.

It is not a de Polignac number, because 216317753 - 2² = 216317749 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216317953) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 725750 + ... + 726047.

It is an arithmetic number, because the mean of its divisors is an integer number (54442425).

Almost surely, 2^216317753 is an apocalyptic number.

It is an amenable number.

216317753 is a deficient number, since it is larger than the sum of its proper divisors (1451947).

216317753 is a wasteful number, since it uses less digits than its factorization.

216317753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451946.

The product of its digits is 26460, while the sum is 35.

The square root of 216317753 is about 14707.7446605521. The cubic root of 216317753 is about 600.2940715870.

The spelling of 216317753 in words is "two hundred sixteen million, three hundred seventeen thousand, seven hundred fifty-three".