2243891 has 4 divisors (see below), whose sum is σ = 2416512. Its totient is φ = 2071272.

The previous prime is 2243887. The next prime is 2243893. The reversal of 2243891 is 1983422.

2243891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2243891 - 2² = 2243887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2243893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86291 + ... + 86316.

It is an arithmetic number, because the mean of its divisors is an integer number (604128).

2^2243891 is an apocalyptic number.

2243891 is a deficient number, since it is larger than the sum of its proper divisors (172621).

2243891 is a wasteful number, since it uses less digits than its factorization.

2243891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172620.

The product of its digits is 3456, while the sum is 29.

The square root of 2243891 is about 1497.9622825692. The cubic root of 2243891 is about 130.9183688155.

The spelling of 2243891 in words is "two million, two hundred forty-three thousand, eight hundred ninety-one".