2156116513 has 2 divisors, whose sum is σ = 2156116514. Its totient is φ = 2156116512.

The previous prime is 2156116483. The next prime is 2156116517. The reversal of 2156116513 is 3156116512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1891989009 + 264127504 = 43497^2 + 16252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156116513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156116517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078058256 + 1078058257.

It is an arithmetic number, because the mean of its divisors is an integer number (1078058257).

Almost surely, 2^2156116513 is an apocalyptic number.

It is an amenable number.

2156116513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156116513 is an equidigital number, since it uses as much as digits as its factorization.

2156116513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 2156116513 is about 46434.0016905715. The cubic root of 2156116513 is about 1291.8856530627.

Subtracting 2156116513 from its reverse (3156116512), we obtain a palindrome (999999999).

The spelling of 2156116513 in words is "two billion, one hundred fifty-six million, one hundred sixteen thousand, five hundred thirteen".