51044813 has 2 divisors, whose sum is σ = 51044814. Its totient is φ = 51044812.

The previous prime is 51044803. The next prime is 51044837. The reversal of 51044813 is 31844015.

51044813 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 can be written as a sum of positive squares in only one way, i.e., 50098084 + 946729 = 7078^2 + 973^2 .

It is a cyclic number.

It is not a de Polignac number, because 51044813 - 2²⁰ = 49996237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51044803) 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, 25522406 + 25522407.

It is an arithmetic number, because the mean of its divisors is an integer number (25522407).

Almost surely, 2^51044813 is an apocalyptic number.

It is an amenable number.

51044813 is a deficient number, since it is larger than the sum of its proper divisors (1).

51044813 is an equidigital number, since it uses as much as digits as its factorization.

51044813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 51044813 is about 7144.5652771880. The cubic root of 51044813 is about 370.9515633396.

Adding to 51044813 its reverse (31844015), we get a palindrome (82888828).

The spelling of 51044813 in words is "fifty-one million, forty-four thousand, eight hundred thirteen".