2112457857 has 4 divisors (see below), whose sum is σ = 2816610480. Its totient is φ = 1408305236.

The previous prime is 2112457813. The next prime is 2112457873. The reversal of 2112457857 is 7587542112.

2112457857 is digitally balanced in base 4, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112457857 - 2¹¹ = 2112455809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2112457157) 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, 352076307 + ... + 352076312.

It is an arithmetic number, because the mean of its divisors is an integer number (704152620).

Almost surely, 2^2112457857 is an apocalyptic number.

It is an amenable number.

2112457857 is a deficient number, since it is larger than the sum of its proper divisors (704152623).

2112457857 is an equidigital number, since it uses as much as digits as its factorization.

2112457857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704152622.

The product of its digits is 156800, while the sum is 42.

The square root of 2112457857 is about 45961.4823194379. The cubic root of 2112457857 is about 1283.1064394437.

Adding to 2112457857 its reverse (7587542112), we get a palindrome (9699999969).

The spelling of 2112457857 in words is "two billion, one hundred twelve million, four hundred fifty-seven thousand, eight hundred fifty-seven".