7311125131 has 2 divisors, whose sum is σ = 7311125132. Its totient is φ = 7311125130.

The previous prime is 7311125117. The next prime is 7311125141. The reversal of 7311125131 is 1315211137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7311125131 - 2⁵ = 7311125099 is a prime.

It is a super-2 number, since 2×7311125131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7311125096 and 7311125105.

It is not a weakly prime, because it can be changed into another prime (7311125141) 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, 3655562565 + 3655562566.

It is an arithmetic number, because the mean of its divisors is an integer number (3655562566).

Almost surely, 2^7311125131 is an apocalyptic number.

7311125131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7311125131 is an equidigital number, since it uses as much as digits as its factorization.

7311125131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 25.

The square root of 7311125131 is about 85505.1175719910. The cubic root of 7311125131 is about 1940.8623660121.

Adding to 7311125131 its reverse (1315211137), we get a palindrome (8626336268).

The spelling of 7311125131 in words is "seven billion, three hundred eleven million, one hundred twenty-five thousand, one hundred thirty-one".