51785971 has 2 divisors, whose sum is σ = 51785972. Its totient is φ = 51785970.

The previous prime is 51785959. The next prime is 51785989. The reversal of 51785971 is 17958715.

51785971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51785971 - 2¹¹ = 51783923 is a prime.

It is not a weakly prime, because it can be changed into another prime (51785471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25892985 + 25892986.

It is an arithmetic number, because the mean of its divisors is an integer number (25892986).

Almost surely, 2^51785971 is an apocalyptic number.

51785971 is a deficient number, since it is larger than the sum of its proper divisors (1).

51785971 is an equidigital number, since it uses as much as digits as its factorization.

51785971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 43.

The square root of 51785971 is about 7196.2470079897. The cubic root of 51785971 is about 372.7383181357.

The spelling of 51785971 in words is "fifty-one million, seven hundred eighty-five thousand, nine hundred seventy-one".