216715 has 8 divisors (see below), whose sum is σ = 263520. Its totient is φ = 171072.

The previous prime is 216703. The next prime is 216719. The reversal of 216715 is 517612.

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 216715 - 2¹¹ = 214667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216719) 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, 202 + ... + 688.

It is an arithmetic number, because the mean of its divisors is an integer number (32940).

2²¹⁶⁷¹⁵ is an apocalyptic number.

216715 is a deficient number, since it is larger than the sum of its proper divisors (46805).

216715 is an equidigital number, since it uses as much as digits as its factorization.

216715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 420, while the sum is 22.

The square root of 216715 is about 465.5265835589. The cubic root of 216715 is about 60.0661307889.

The spelling of 216715 in words is "two hundred sixteen thousand, seven hundred fifteen".