51125717 has 2 divisors, whose sum is σ = 51125718. Its totient is φ = 51125716.

The previous prime is 51125671. The next prime is 51125741. The reversal of 51125717 is 71752115.

51125717 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., 35688676 + 15437041 = 5974^2 + 3929^2 .

It is a cyclic number.

It is not a de Polignac number, because 51125717 - 2⁸ = 51125461 is a prime.

It is a super-2 number, since 2×51125717² = 5227677877528178, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51125717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51125117) 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, 25562858 + 25562859.

It is an arithmetic number, because the mean of its divisors is an integer number (25562859).

Almost surely, 2^51125717 is an apocalyptic number.

It is an amenable number.

51125717 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125717 is an equidigital number, since it uses as much as digits as its factorization.

51125717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2450, while the sum is 29.

The square root of 51125717 is about 7150.2249614960. The cubic root of 51125717 is about 371.1474410518.

The spelling of 51125717 in words is "fifty-one million, one hundred twenty-five thousand, seven hundred seventeen".