216715313 has 4 divisors (see below), whose sum is σ = 221755248. Its totient is φ = 211675380.

The previous prime is 216715309. The next prime is 216715321. The reversal of 216715313 is 313517612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216715313 - 2² = 216715309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216715333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519903 + ... + 2519988.

It is an arithmetic number, because the mean of its divisors is an integer number (55438812).

Almost surely, 2^216715313 is an apocalyptic number.

It is an amenable number.

216715313 is a deficient number, since it is larger than the sum of its proper divisors (5039935).

216715313 is an equidigital number, since it uses as much as digits as its factorization.

216715313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039934.

The product of its digits is 3780, while the sum is 29.

The square root of 216715313 is about 14721.2537849193. The cubic root of 216715313 is about 600.6615970659.

The spelling of 216715313 in words is "two hundred sixteen million, seven hundred fifteen thousand, three hundred thirteen".