2243905 has 8 divisors (see below), whose sum is σ = 2725632. Its totient is φ = 1773168.

The previous prime is 2243893. The next prime is 2243909. The reversal of 2243905 is 5093422.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2243905 - 2⁷ = 2243777 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 2¹³ + 4⁹ + 3⁹ + 9³ + 0 + 5⁹ .

It is a Duffinian number.

2243905 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2243905.

It is not an unprimeable number, because it can be changed into a prime (2243909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (340704).

2^2243905 is an apocalyptic number.

It is an amenable number.

2243905 is a deficient number, since it is larger than the sum of its proper divisors (481727).

2243905 is an equidigital number, since it uses as much as digits as its factorization.

2243905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2243905 is about 1497.9669555768. The cubic root of 2243905 is about 130.9186410886.

The spelling of 2243905 in words is "two million, two hundred forty-three thousand, nine hundred five".