2113443257 has 2 divisors, whose sum is σ = 2113443258. Its totient is φ = 2113443256.

The previous prime is 2113443229. The next prime is 2113443331. The reversal of 2113443257 is 7523443112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1731475321 + 381967936 = 41611^2 + 19544^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113443257 - 2⁸ = 2113443001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113443457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056721628 + 1056721629.

It is an arithmetic number, because the mean of its divisors is an integer number (1056721629).

Almost surely, 2^2113443257 is an apocalyptic number.

It is an amenable number.

2113443257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113443257 is an equidigital number, since it uses as much as digits as its factorization.

2113443257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 2113443257 is about 45972.2009153358. The cubic root of 2113443257 is about 1283.3059190111.

Adding to 2113443257 its reverse (7523443112), we get a palindrome (9636886369).

The spelling of 2113443257 in words is "two billion, one hundred thirteen million, four hundred forty-three thousand, two hundred fifty-seven".