2205816 has 16 divisors (see below), whose sum is σ = 5514600. Its totient is φ = 735264.

The previous prime is 2205803. The next prime is 2205823. The reversal of 2205816 is 6185022.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 91909 = 2205816 / (2 + 2 + 0 + 5 + 8 + 1 + 6).

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, 45931 + ... + 45978.

2^2205816 is an apocalyptic number.

It is an amenable number.

2205816 is an abundant number, since it is smaller than the sum of its proper divisors (3308784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2205816 is a wasteful number, since it uses less digits than its factorization.

2205816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91918 (or 91914 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2205816 is about 1485.1989765685. The cubic root of 2205816 is about 130.1736535325.

The spelling of 2205816 in words is "two million, two hundred five thousand, eight hundred sixteen".