51565011413 has 2 divisors, whose sum is σ = 51565011414. Its totient is φ = 51565011412.

The previous prime is 51565011403. The next prime is 51565011469. The reversal of 51565011413 is 31411056515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51500401969 + 64609444 = 226937^2 + 8038^2 .

It is a cyclic number.

It is not a de Polignac number, because 51565011413 - 2⁴ = 51565011397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51565011413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51565011403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25782505706 + 25782505707.

It is an arithmetic number, because the mean of its divisors is an integer number (25782505707).

Almost surely, 2^51565011413 is an apocalyptic number.

It is an amenable number.

51565011413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51565011413 is an equidigital number, since it uses as much as digits as its factorization.

51565011413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 51565011413 its reverse (31411056515), we get a palindrome (82976067928).

The spelling of 51565011413 in words is "fifty-one billion, five hundred sixty-five million, eleven thousand, four hundred thirteen".