51040415513 has 2 divisors, whose sum is σ = 51040415514. Its totient is φ = 51040415512.

The previous prime is 51040415507. The next prime is 51040415539. The reversal of 51040415513 is 31551404015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45146475529 + 5893939984 = 212477^2 + 76772^2 .

It is a cyclic number.

It is not a de Polignac number, because 51040415513 - 2²⁴ = 51023638297 is a prime.

It is not a weakly prime, because it can be changed into another prime (51040415563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25520207756 + 25520207757.

It is an arithmetic number, because the mean of its divisors is an integer number (25520207757).

Almost surely, 2^51040415513 is an apocalyptic number.

It is an amenable number.

51040415513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51040415513 is an equidigital number, since it uses as much as digits as its factorization.

51040415513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 51040415513 its reverse (31551404015), we get a palindrome (82591819528).

The spelling of 51040415513 in words is "fifty-one billion, forty million, four hundred fifteen thousand, five hundred thirteen".