2219815 has 24 divisors (see below), whose sum is σ = 3004128. Its totient is φ = 1572480.

The previous prime is 2219813. The next prime is 2219831. The reversal of 2219815 is 5189122.

It is not a de Polignac number, because 2219815 - 2¹ = 2219813 is a prime.

It is a Duffinian number.

2219815 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31230 + ... + 31300.

It is an arithmetic number, because the mean of its divisors is an integer number (125172).

2^2219815 is an apocalyptic number.

2219815 is a deficient number, since it is larger than the sum of its proper divisors (784313).

2219815 is a wasteful number, since it uses less digits than its factorization.

2219815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 126 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 2219815 is about 1489.9043593466. The cubic root of 2219815 is about 130.4484512326.

The spelling of 2219815 in words is "two million, two hundred nineteen thousand, eight hundred fifteen".