2215305 has 24 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 1118880.

The previous prime is 2215303. The next prime is 2215307. The reversal of 2215305 is 5035122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2215303) and next prime (2215307).

It is not a de Polignac number, because 2215305 - 2¹ = 2215303 is a prime.

It is a Curzon number.

2215305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2215303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^2215305 is an apocalyptic number.

It is an amenable number.

2215305 is a deficient number, since it is larger than the sum of its proper divisors (1828215).

2215305 is a wasteful number, since it uses less digits than its factorization.

2215305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2215305 is about 1488.3900698406. The cubic root of 2215305 is about 130.3600472595.

The spelling of 2215305 in words is "two million, two hundred fifteen thousand, three hundred five".