216663795 has 32 divisors (see below), whose sum is σ = 401932800. Its totient is φ = 110528352.

The previous prime is 216663787. The next prime is 216663829. The reversal of 216663795 is 597366612.

It is not a de Polignac number, because 216663795 - 2³ = 216663787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 216663795.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31785 + ... + 37994.

It is an arithmetic number, because the mean of its divisors is an integer number (12560400).

Almost surely, 2^216663795 is an apocalyptic number.

216663795 is a deficient number, since it is larger than the sum of its proper divisors (185269005).

216663795 is a wasteful number, since it uses less digits than its factorization.

216663795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69816 (or 69810 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 216663795 is about 14719.5038978900. The cubic root of 216663795 is about 600.6139964662.

The spelling of 216663795 in words is "two hundred sixteen million, six hundred sixty-three thousand, seven hundred ninety-five".