51708191 has 2 divisors, whose sum is σ = 51708192. Its totient is φ = 51708190.

The previous prime is 51708161. The next prime is 51708193. The reversal of 51708191 is 19180715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51708191 - 2⁶ = 51708127 is a prime.

Together with 51708193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51708193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25854095 + 25854096.

It is an arithmetic number, because the mean of its divisors is an integer number (25854096).

Almost surely, 2^51708191 is an apocalyptic number.

51708191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51708191 is an equidigital number, since it uses as much as digits as its factorization.

51708191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 51708191 is about 7190.8407714258. The cubic root of 51708191 is about 372.5516130455.

The spelling of 51708191 in words is "fifty-one million, seven hundred eight thousand, one hundred ninety-one".