2112457813 has 2 divisors, whose sum is σ = 2112457814. Its totient is φ = 2112457812.

The previous prime is 2112457799. The next prime is 2112457873. The reversal of 2112457813 is 3187542112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1489805604 + 622652209 = 38598^2 + 24953^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112457813 - 2⁹ = 2112457301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112457873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056228906 + 1056228907.

It is an arithmetic number, because the mean of its divisors is an integer number (1056228907).

Almost surely, 2^2112457813 is an apocalyptic number.

It is an amenable number.

2112457813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112457813 is an equidigital number, since it uses as much as digits as its factorization.

2112457813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 2112457813 is about 45961.4818407762. The cubic root of 2112457813 is about 1283.1064305351.

Adding to 2112457813 its reverse (3187542112), we get a palindrome (5299999925).

The spelling of 2112457813 in words is "two billion, one hundred twelve million, four hundred fifty-seven thousand, eight hundred thirteen".