51555893 has 2 divisors, whose sum is σ = 51555894. Its totient is φ = 51555892.

The previous prime is 51555887. The next prime is 51555899. The reversal of 51555893 is 39855515.

51555893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (51555887) and next prime (51555899).

It can be written as a sum of positive squares in only one way, i.e., 41964484 + 9591409 = 6478^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 51555893 - 2⁴ = 51555877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51555893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51555899) 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, 25777946 + 25777947.

It is an arithmetic number, because the mean of its divisors is an integer number (25777947).

Almost surely, 2^51555893 is an apocalyptic number.

It is an amenable number.

51555893 is a deficient number, since it is larger than the sum of its proper divisors (1).

51555893 is an equidigital number, since it uses as much as digits as its factorization.

51555893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 41.

The square root of 51555893 is about 7180.2432410051. The cubic root of 51555893 is about 372.1854901238.

The spelling of 51555893 in words is "fifty-one million, five hundred fifty-five thousand, eight hundred ninety-three".