2821215 has 24 divisors (see below), whose sum is σ = 4773168. Its totient is φ = 1422720.

The previous prime is 2821183. The next prime is 2821229. The reversal of 2821215 is 5121282.

It is a happy number.

It is not a de Polignac number, because 2821215 - 2⁵ = 2821183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2821191 and 2821200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5155 + ... + 5675.

It is an arithmetic number, because the mean of its divisors is an integer number (198882).

2^2821215 is an apocalyptic number.

2821215 is a deficient number, since it is larger than the sum of its proper divisors (1951953).

2821215 is a wasteful number, since it uses less digits than its factorization.

2821215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 548 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 2821215 is about 1679.6472844023. The cubic root of 2821215 is about 141.3010518466.

Adding to 2821215 its reverse (5121282), we get a palindrome (7942497).

The spelling of 2821215 in words is "two million, eight hundred twenty-one thousand, two hundred fifteen".