216531314 has 8 divisors (see below), whose sum is σ = 324993900. Its totient is φ = 108200016.

The previous prime is 216531307. The next prime is 216531331. The reversal of 216531314 is 413135612.

It can be written as a sum of positive squares in 2 ways, for example, as 215943025 + 588289 = 14695^2 + 767^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28589 + ... + 35360.

Almost surely, 2^216531314 is an apocalyptic number.

216531314 is a deficient number, since it is larger than the sum of its proper divisors (108462586).

216531314 is a wasteful number, since it uses less digits than its factorization.

216531314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65644.

The product of its digits is 2160, while the sum is 26.

The square root of 216531314 is about 14715.0030241247. The cubic root of 216531314 is about 600.4915545876.

Adding to 216531314 its reverse (413135612), we get a palindrome (629666926).

The spelling of 216531314 in words is "two hundred sixteen million, five hundred thirty-one thousand, three hundred fourteen".