51717871 has 2 divisors, whose sum is σ = 51717872. Its totient is φ = 51717870.

The previous prime is 51717833. The next prime is 51717923. The reversal of 51717871 is 17871715.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51717871 - 2¹¹ = 51715823 is a prime.

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 51717871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51717821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25858935 + 25858936.

It is an arithmetic number, because the mean of its divisors is an integer number (25858936).

Almost surely, 2^51717871 is an apocalyptic number.

51717871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51717871 is an equidigital number, since it uses as much as digits as its factorization.

51717871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13720, while the sum is 37.

The square root of 51717871 is about 7191.5138183834. The cubic root of 51717871 is about 372.5748593600.

The spelling of 51717871 in words is "fifty-one million, seven hundred seventeen thousand, eight hundred seventy-one".