51839551 has 2 divisors, whose sum is σ = 51839552. Its totient is φ = 51839550.

The previous prime is 51839549. The next prime is 51839561. The reversal of 51839551 is 15593815.

51839551 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 51839551 - 2¹ = 51839549 is a prime.

Together with 51839549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51839551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51839521) 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, 25919775 + 25919776.

It is an arithmetic number, because the mean of its divisors is an integer number (25919776).

Almost surely, 2^51839551 is an apocalyptic number.

51839551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51839551 is an equidigital number, since it uses as much as digits as its factorization.

51839551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 37.

The square root of 51839551 is about 7199.9688193769. The cubic root of 51839551 is about 372.8668242087.

The spelling of 51839551 in words is "fifty-one million, eight hundred thirty-nine thousand, five hundred fifty-one".