5115131311 has 2 divisors, whose sum is σ = 5115131312. Its totient is φ = 5115131310.

The previous prime is 5115131291. The next prime is 5115131317. The reversal of 5115131311 is 1131315115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5115131311 - 2⁵ = 5115131279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5115131317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2557565655 + 2557565656.

It is an arithmetic number, because the mean of its divisors is an integer number (2557565656).

Almost surely, 2^5115131311 is an apocalyptic number.

5115131311 is a deficient number, since it is larger than the sum of its proper divisors (1).

5115131311 is an equidigital number, since it uses as much as digits as its factorization.

5115131311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225, while the sum is 22.

The square root of 5115131311 is about 71520.1461897275. The cubic root of 5115131311 is about 1723.0012624922.

Adding to 5115131311 its reverse (1131315115), we get a palindrome (6246446426).

The spelling of 5115131311 in words is "five billion, one hundred fifteen million, one hundred thirty-one thousand, three hundred eleven".