216288214 has 4 divisors (see below), whose sum is σ = 324432324. Its totient is φ = 108144106.

The previous prime is 216288211. The next prime is 216288221. The reversal of 216288214 is 412882612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 216288214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216288211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54072052 + ... + 54072055.

It is an arithmetic number, because the mean of its divisors is an integer number (81108081).

Almost surely, 2^216288214 is an apocalyptic number.

216288214 is a deficient number, since it is larger than the sum of its proper divisors (108144110).

216288214 is a wasteful number, since it uses less digits than its factorization.

216288214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108144109.

The product of its digits is 12288, while the sum is 34.

The square root of 216288214 is about 14706.7404274367. The cubic root of 216288214 is about 600.2667462080.

The spelling of 216288214 in words is "two hundred sixteen million, two hundred eighty-eight thousand, two hundred fourteen".