216868514 has 4 divisors (see below), whose sum is σ = 325302774. Its totient is φ = 108434256.

The previous prime is 216868511. The next prime is 216868517. The reversal of 216868514 is 415868612.

216868514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (216868511) and next prime (216868517).

It can be written as a sum of positive squares in only one way, i.e., 190909489 + 25959025 = 13817^2 + 5095^2 .

It is not an unprimeable number, because it can be changed into a prime (216868511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54217127 + ... + 54217130.

Almost surely, 2^216868514 is an apocalyptic number.

216868514 is a deficient number, since it is larger than the sum of its proper divisors (108434260).

216868514 is a wasteful number, since it uses less digits than its factorization.

216868514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108434259.

The product of its digits is 92160, while the sum is 41.

The square root of 216868514 is about 14726.4562607574. The cubic root of 216868514 is about 600.8031041895.

The spelling of 216868514 in words is "two hundred sixteen million, eight hundred sixty-eight thousand, five hundred fourteen".