2805222 has 16 divisors (see below), whose sum is σ = 6412032. Its totient is φ = 801480.

The previous prime is 2805203. The next prime is 2805227. The reversal of 2805222 is 2225082.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805227) 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 7 ways as a sum of consecutive naturals, for example, 33354 + ... + 33437.

It is an arithmetic number, because the mean of its divisors is an integer number (400752).

2^2805222 is an apocalyptic number.

2805222 is an abundant number, since it is smaller than the sum of its proper divisors (3606810).

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

2805222 is a wasteful number, since it uses less digits than its factorization.

2805222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66803.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2805222 is about 1674.8796971723. The cubic root of 2805222 is about 141.0335416406.

The spelling of 2805222 in words is "two million, eight hundred five thousand, two hundred twenty-two".