2113145257 has 2 divisors, whose sum is σ = 2113145258. Its totient is φ = 2113145256.

The previous prime is 2113145231. The next prime is 2113145303. The reversal of 2113145257 is 7525413112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806335001 + 306810256 = 42501^2 + 17516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113145257 - 2¹¹ = 2113143209 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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056572628 + 1056572629.

It is an arithmetic number, because the mean of its divisors is an integer number (1056572629).

Almost surely, 2^2113145257 is an apocalyptic number.

It is an amenable number.

2113145257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113145257 is an equidigital number, since it uses as much as digits as its factorization.

2113145257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 2113145257 is about 45968.9597119622. The cubic root of 2113145257 is about 1283.2455998868.

Adding to 2113145257 its reverse (7525413112), we get a palindrome (9638558369).

The spelling of 2113145257 in words is "two billion, one hundred thirteen million, one hundred forty-five thousand, two hundred fifty-seven".