2112440243 has 4 divisors (see below), whose sum is σ = 2185283040. Its totient is φ = 2039597448.

The previous prime is 2112440237. The next prime is 2112440251. The reversal of 2112440243 is 3420442112.

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 2112440243 - 2⁴ = 2112440227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112440263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36421355 + ... + 36421412.

It is an arithmetic number, because the mean of its divisors is an integer number (546320760).

Almost surely, 2^2112440243 is an apocalyptic number.

2112440243 is a deficient number, since it is larger than the sum of its proper divisors (72842797).

2112440243 is an equidigital number, since it uses as much as digits as its factorization.

2112440243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72842796.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2112440243 is about 45961.2907020680. The cubic root of 2112440243 is about 1283.1028731872.

Adding to 2112440243 its reverse (3420442112), we get a palindrome (5532882355).

The spelling of 2112440243 in words is "two billion, one hundred twelve million, four hundred forty thousand, two hundred forty-three".