216215 has 8 divisors (see below), whose sum is σ = 263088. Its totient is φ = 170560.

The previous prime is 216211. The next prime is 216217. The reversal of 216215 is 512612.

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

It is not a de Polignac number, because 216215 - 2² = 216211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216193 and 216202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216211) 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, 155 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (32886).

2²¹⁶²¹⁵ is an apocalyptic number.

216215 is a deficient number, since it is larger than the sum of its proper divisors (46873).

216215 is an equidigital number, since it uses as much as digits as its factorization.

216215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609.

The product of its digits is 120, while the sum is 17.

The square root of 216215 is about 464.9892471875. The cubic root of 216215 is about 60.0199008060.

Adding to 216215 its reverse (512612), we get a palindrome (728827).

The spelling of 216215 in words is "two hundred sixteen thousand, two hundred fifteen".