2291943 has 16 divisors (see below), whose sum is σ = 3175040. Its totient is φ = 1469664.

The previous prime is 2291929. The next prime is 2291959. The reversal of 2291943 is 3491922.

It is not a de Polignac number, because 2291943 - 2⁵ = 2291911 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2291943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291903) 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 15 ways as a sum of consecutive naturals, for example, 13980 + ... + 14142.

It is an arithmetic number, because the mean of its divisors is an integer number (198440).

2^2291943 is an apocalyptic number.

2291943 is a deficient number, since it is larger than the sum of its proper divisors (883097).

2291943 is a wasteful number, since it uses less digits than its factorization.

2291943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its digits is 3888, while the sum is 30.

The square root of 2291943 is about 1513.9164441937. The cubic root of 2291943 is about 131.8462972205.

The spelling of 2291943 in words is "two million, two hundred ninety-one thousand, nine hundred forty-three".