51295729 has 2 divisors, whose sum is σ = 51295730. Its totient is φ = 51295728.

The previous prime is 51295723. The next prime is 51295787. The reversal of 51295729 is 92759215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47983329 + 3312400 = 6927^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 51295729 - 2¹¹ = 51293681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51295691 and 51295700.

It is not a weakly prime, because it can be changed into another prime (51295723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25647864 + 25647865.

It is an arithmetic number, because the mean of its divisors is an integer number (25647865).

Almost surely, 2^51295729 is an apocalyptic number.

It is an amenable number.

51295729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51295729 is an equidigital number, since it uses as much as digits as its factorization.

51295729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 51295729 is about 7162.1036714083. The cubic root of 51295729 is about 371.5583869075.

The spelling of 51295729 in words is "fifty-one million, two hundred ninety-five thousand, seven hundred twenty-nine".