2243943 has 20 divisors (see below), whose sum is σ = 3611608. Its totient is φ = 1380240.

The previous prime is 2243911. The next prime is 2243959. The reversal of 2243943 is 3493422.

It is a happy number.

It is not a de Polignac number, because 2243943 - 2⁵ = 2243911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2 + 2¹⁹ + 4² + 3¹⁰ + 9³ + 4⁸ + 3¹³ .

2243943 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243743) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13 + ... + 2118.

2^2243943 is an apocalyptic number.

2243943 is a deficient number, since it is larger than the sum of its proper divisors (1367665).

2243943 is a wasteful number, since it uses less digits than its factorization.

2243943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2147 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 2243943 is about 1497.9796393810. The cubic root of 2243943 is about 130.9193801098.

The spelling of 2243943 in words is "two million, two hundred forty-three thousand, nine hundred forty-three".