51289757 has 2 divisors, whose sum is σ = 51289758. Its totient is φ = 51289756.

The previous prime is 51289753. The next prime is 51289781. The reversal of 51289757 is 75798215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 9156676 = 6491^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 51289757 - 2² = 51289753 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51289753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25644878 + 25644879.

It is an arithmetic number, because the mean of its divisors is an integer number (25644879).

Almost surely, 2^51289757 is an apocalyptic number.

It is an amenable number.

51289757 is a deficient number, since it is larger than the sum of its proper divisors (1).

51289757 is an equidigital number, since it uses as much as digits as its factorization.

51289757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 44.

The square root of 51289757 is about 7161.6867426606. The cubic root of 51289757 is about 371.5439670403.

The spelling of 51289757 in words is "fifty-one million, two hundred eighty-nine thousand, seven hundred fifty-seven".