216433313 has 8 divisors (see below), whose sum is σ = 233982720. Its totient is φ = 199499760.

The previous prime is 216433309. The next prime is 216433331. The reversal of 216433313 is 313334612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216433313 - 2² = 216433309 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216433303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153233 + ... + 154638.

It is an arithmetic number, because the mean of its divisors is an integer number (29247840).

Almost surely, 2^216433313 is an apocalyptic number.

It is an amenable number.

216433313 is a deficient number, since it is larger than the sum of its proper divisors (17549407).

216433313 is a wasteful number, since it uses less digits than its factorization.

216433313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307927.

The product of its digits is 3888, while the sum is 26.

The square root of 216433313 is about 14711.6726785230. The cubic root of 216433313 is about 600.4009477492.

Adding to 216433313 its reverse (313334612), we get a palindrome (529767925).

The spelling of 216433313 in words is "two hundred sixteen million, four hundred thirty-three thousand, three hundred thirteen".