51021683 has 2 divisors, whose sum is σ = 51021684. Its totient is φ = 51021682.

The previous prime is 51021667. The next prime is 51021697. The reversal of 51021683 is 38612015.

51021683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51021683 - 2⁴ = 51021667 is a prime.

It is not a weakly prime, because it can be changed into another prime (51021083) 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, 25510841 + 25510842.

It is an arithmetic number, because the mean of its divisors is an integer number (25510842).

Almost surely, 2^51021683 is an apocalyptic number.

51021683 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021683 is an equidigital number, since it uses as much as digits as its factorization.

51021683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 51021683 is about 7142.9463808711. The cubic root of 51021683 is about 370.8955249592.

Adding to 51021683 its reverse (38612015), we get a palindrome (89633698).

The spelling of 51021683 in words is "fifty-one million, twenty-one thousand, six hundred eighty-three".