2112457843 has 4 divisors (see below), whose sum is σ = 2113704360. Its totient is φ = 2111211328.

The previous prime is 2112457813. The next prime is 2112457873. The reversal of 2112457843 is 3487542112.

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

It is an interprime number because it is at equal distance from previous prime (2112457813) and next prime (2112457873).

It is a cyclic number.

It is not a de Polignac number, because 2112457843 - 2⁹ = 2112457331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112457813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620713 + ... + 624106.

It is an arithmetic number, because the mean of its divisors is an integer number (528426090).

Almost surely, 2^2112457843 is an apocalyptic number.

2112457843 is a deficient number, since it is larger than the sum of its proper divisors (1246517).

2112457843 is a wasteful number, since it uses less digits than its factorization.

2112457843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246516.

The product of its digits is 53760, while the sum is 37.

The square root of 2112457843 is about 45961.4821671364. The cubic root of 2112457843 is about 1283.1064366091.

Adding to 2112457843 its reverse (3487542112), we get a palindrome (5599999955).

The spelling of 2112457843 in words is "two billion, one hundred twelve million, four hundred fifty-seven thousand, eight hundred forty-three".