216710266 has 8 divisors (see below), whose sum is σ = 325221120. Its totient is φ = 108303228.

The previous prime is 216710251. The next prime is 216710267. The reversal of 216710266 is 662017612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216710267) 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, 20506 + ... + 29221.

It is an arithmetic number, because the mean of its divisors is an integer number (40652640).

Almost surely, 2^216710266 is an apocalyptic number.

216710266 is a deficient number, since it is larger than the sum of its proper divisors (108510854).

216710266 is a wasteful number, since it uses less digits than its factorization.

216710266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51908.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 216710266 is about 14721.0823650980. The cubic root of 216710266 is about 600.6569341704.

Adding to 216710266 its reverse (662017612), we get a palindrome (878727878).

The spelling of 216710266 in words is "two hundred sixteen million, seven hundred ten thousand, two hundred sixty-six".