216768017 has 4 divisors (see below), whose sum is σ = 228176880. Its totient is φ = 205359156.

The previous prime is 216767989. The next prime is 216768043. The reversal of 216768017 is 710867612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216768017 - 2¹⁸ = 216505873 is a prime.

It is a super-2 number, since 2×216768017² = 93976746388224578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216768047) 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, 5704403 + ... + 5704440.

It is an arithmetic number, because the mean of its divisors is an integer number (57044220).

Almost surely, 2^216768017 is an apocalyptic number.

It is an amenable number.

216768017 is a deficient number, since it is larger than the sum of its proper divisors (11408863).

216768017 is a wasteful number, since it uses less digits than its factorization.

216768017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11408862.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 216768017 is about 14723.0437410204. The cubic root of 216768017 is about 600.7102856771.

The spelling of 216768017 in words is "two hundred sixteen million, seven hundred sixty-eight thousand, seventeen".