51499859 has 2 divisors, whose sum is σ = 51499860. Its totient is φ = 51499858.

The previous prime is 51499837. The next prime is 51499883. The reversal of 51499859 is 95899415.

51499859 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-51499859 is a prime.

It is not a weakly prime, because it can be changed into another prime (51495859) 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, 25749929 + 25749930.

It is an arithmetic number, because the mean of its divisors is an integer number (25749930).

Almost surely, 2^51499859 is an apocalyptic number.

51499859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51499859 is an equidigital number, since it uses as much as digits as its factorization.

51499859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 50.

The square root of 51499859 is about 7176.3402232614. The cubic root of 51499859 is about 372.0506034949.

The spelling of 51499859 in words is "fifty-one million, four hundred ninety-nine thousand, eight hundred fifty-nine".