51713261 has 2 divisors, whose sum is σ = 51713262. Its totient is φ = 51713260.

The previous prime is 51713251. The next prime is 51713267. The reversal of 51713261 is 16231715.

51713261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 17161 = 7190^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 51713261 - 2¹⁴ = 51696877 is a prime.

It is a super-2 number, since 2×51713261² = 5348522726508242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51713261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51713267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25856630 + 25856631.

It is an arithmetic number, because the mean of its divisors is an integer number (25856631).

Almost surely, 2^51713261 is an apocalyptic number.

It is an amenable number.

51713261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51713261 is an equidigital number, since it uses as much as digits as its factorization.

51713261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 51713261 is about 7191.1932945791. The cubic root of 51713261 is about 372.5637889047.

Adding to 51713261 its reverse (16231715), we get a palindrome (67944976).

The spelling of 51713261 in words is "fifty-one million, seven hundred thirteen thousand, two hundred sixty-one".