51815063 has 2 divisors, whose sum is σ = 51815064. Its totient is φ = 51815062.

The previous prime is 51815041. The next prime is 51815089. The reversal of 51815063 is 36051815.

51815063 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 a de Polignac number, because none of the positive numbers 2^k-51815063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53815063) 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, 25907531 + 25907532.

It is an arithmetic number, because the mean of its divisors is an integer number (25907532).

Almost surely, 2^51815063 is an apocalyptic number.

51815063 is a deficient number, since it is larger than the sum of its proper divisors (1).

51815063 is an equidigital number, since it uses as much as digits as its factorization.

51815063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51815063 is about 7198.2680555811. The cubic root of 51815063 is about 372.8081032725.

Adding to 51815063 its reverse (36051815), we get a palindrome (87866878).

The spelling of 51815063 in words is "fifty-one million, eight hundred fifteen thousand, sixty-three".