2113113257 has 2 divisors, whose sum is σ = 2113113258. Its totient is φ = 2113113256.

The previous prime is 2113113229. The next prime is 2113113307. The reversal of 2113113257 is 7523113112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493899801 + 619213456 = 38651^2 + 24884^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113113257 - 2⁸ = 2113113001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113143257) 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 as a sum of consecutive naturals, namely, 1056556628 + 1056556629.

It is an arithmetic number, because the mean of its divisors is an integer number (1056556629).

Almost surely, 2^2113113257 is an apocalyptic number.

It is an amenable number.

2113113257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113113257 is an equidigital number, since it uses as much as digits as its factorization.

2113113257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 2113113257 is about 45968.6116496898. The cubic root of 2113113257 is about 1283.2391223282.

Adding to 2113113257 its reverse (7523113112), we get a palindrome (9636226369).

The spelling of 2113113257 in words is "two billion, one hundred thirteen million, one hundred thirteen thousand, two hundred fifty-seven".