51708161 has 2 divisors, whose sum is σ = 51708162. Its totient is φ = 51708160.

The previous prime is 51708157. The next prime is 51708191. The reversal of 51708161 is 16180715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51394561 + 313600 = 7169^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 51708161 - 2² = 51708157 is a prime.

It is not a weakly prime, because it can be changed into another prime (51708191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25854080 + 25854081.

It is an arithmetic number, because the mean of its divisors is an integer number (25854081).

Almost surely, 2^51708161 is an apocalyptic number.

It is an amenable number.

51708161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51708161 is an equidigital number, since it uses as much as digits as its factorization.

51708161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 51708161 is about 7190.8386854386. The cubic root of 51708161 is about 372.5515409967.

Adding to 51708161 its reverse (16180715), we get a palindrome (67888876).

It can be divided in two parts, 5170 and 8161, that added together give a palindrome (13331).

The spelling of 51708161 in words is "fifty-one million, seven hundred eight thousand, one hundred sixty-one".