216868895 has 4 divisors (see below), whose sum is σ = 260242680. Its totient is φ = 173495112.

The previous prime is 216868891. The next prime is 216868903. The reversal of 216868895 is 598868612.

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

It is a cyclic number.

It is not a de Polignac number, because 216868895 - 2² = 216868891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216868891) 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, 21686885 + ... + 21686894.

It is an arithmetic number, because the mean of its divisors is an integer number (65060670).

Almost surely, 2^216868895 is an apocalyptic number.

216868895 is a deficient number, since it is larger than the sum of its proper divisors (43373785).

216868895 is an equidigital number, since it uses as much as digits as its factorization.

216868895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43373784.

The product of its digits is 1658880, while the sum is 53.

The square root of 216868895 is about 14726.4691966540. The cubic root of 216868895 is about 600.8034560245.

The spelling of 216868895 in words is "two hundred sixteen million, eight hundred sixty-eight thousand, eight hundred ninety-five".