2216215 has 4 divisors (see below), whose sum is σ = 2659464. Its totient is φ = 1772968.

The previous prime is 2216213. The next prime is 2216231. The reversal of 2216215 is 5126122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2216215 - 2¹ = 2216213 is a prime.

It is a Duffinian number.

2216215 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2216192 and 2216201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221617 + ... + 221626.

It is an arithmetic number, because the mean of its divisors is an integer number (664866).

2^2216215 is an apocalyptic number.

2216215 is a deficient number, since it is larger than the sum of its proper divisors (443249).

2216215 is an equidigital number, since it uses as much as digits as its factorization.

2216215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443248.

The product of its digits is 240, while the sum is 19.

The square root of 2216215 is about 1488.6957378860. The cubic root of 2216215 is about 130.3778945240.

The spelling of 2216215 in words is "two million, two hundred sixteen thousand, two hundred fifteen".