2229805 has 16 divisors (see below), whose sum is σ = 2913840. Its totient is φ = 1631232.

The previous prime is 2229793. The next prime is 2229809. The reversal of 2229805 is 5089222.

It can be written as a sum of positive squares in 8 ways, for example, as 21609 + 2208196 = 147^2 + 1486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2229805 is a prime.

2229805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2229809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2791 + ... + 3499.

It is an arithmetic number, because the mean of its divisors is an integer number (182115).

2^2229805 is an apocalyptic number.

It is an amenable number.

2229805 is a deficient number, since it is larger than the sum of its proper divisors (684035).

2229805 is a wasteful number, since it uses less digits than its factorization.

2229805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2229805 is about 1493.2531600502. The cubic root of 2229805 is about 130.6438473907.

The spelling of 2229805 in words is "two million, two hundred twenty-nine thousand, eight hundred five".