2215615 has 4 divisors (see below), whose sum is σ = 2658744. Its totient is φ = 1772488.

The previous prime is 2215583. The next prime is 2215639. The reversal of 2215615 is 5165122.

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 2215615 - 2⁵ = 2215583 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221557 + ... + 221566.

It is an arithmetic number, because the mean of its divisors is an integer number (664686).

2^2215615 is an apocalyptic number.

2215615 is a deficient number, since it is larger than the sum of its proper divisors (443129).

2215615 is an equidigital number, since it uses as much as digits as its factorization.

2215615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443128.

The product of its digits is 600, while the sum is 22.

The square root of 2215615 is about 1488.4942055648. The cubic root of 2215615 is about 130.3661276456.

The spelling of 2215615 in words is "two million, two hundred fifteen thousand, six hundred fifteen".