51050581 has 2 divisors, whose sum is σ = 51050582. Its totient is φ = 51050580.

The previous prime is 51050567. The next prime is 51050599. The reversal of 51050581 is 18505015.

51050581 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., 49914225 + 1136356 = 7065^2 + 1066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51050581 is a prime.

It is a super-2 number, since 2×51050581² = 5212323640875122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51050081) 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, 25525290 + 25525291.

It is an arithmetic number, because the mean of its divisors is an integer number (25525291).

Almost surely, 2^51050581 is an apocalyptic number.

It is an amenable number.

51050581 is a deficient number, since it is larger than the sum of its proper divisors (1).

51050581 is an equidigital number, since it uses as much as digits as its factorization.

51050581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 51050581 is about 7144.9689292536. The cubic root of 51050581 is about 370.9655351676.

Adding to 51050581 its reverse (18505015), we get a palindrome (69555596).

The spelling of 51050581 in words is "fifty-one million, fifty thousand, five hundred eighty-one".