2215385 has 4 divisors (see below), whose sum is σ = 2658468. Its totient is φ = 1772304.

The previous prime is 2215379. The next prime is 2215387. The reversal of 2215385 is 5835122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 1669264 = 739^2 + 1292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2215385 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2215387) 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, 221534 + ... + 221543.

It is an arithmetic number, because the mean of its divisors is an integer number (664617).

2^2215385 is an apocalyptic number.

It is an amenable number.

2215385 is a deficient number, since it is larger than the sum of its proper divisors (443083).

2215385 is an equidigital number, since it uses as much as digits as its factorization.

2215385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443082.

The product of its digits is 2400, while the sum is 26.

The square root of 2215385 is about 1488.4169442733. The cubic root of 2215385 is about 130.3616164457.

The spelling of 2215385 in words is "two million, two hundred fifteen thousand, three hundred eighty-five".