51504461 has 2 divisors, whose sum is σ = 51504462. Its totient is φ = 51504460.

The previous prime is 51504457. The next prime is 51504473. The reversal of 51504461 is 16440515.

51504461 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., 45981961 + 5522500 = 6781^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 51504461 - 2² = 51504457 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 51504461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51500461) 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, 25752230 + 25752231.

It is an arithmetic number, because the mean of its divisors is an integer number (25752231).

Almost surely, 2^51504461 is an apocalyptic number.

It is an amenable number.

51504461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51504461 is an equidigital number, since it uses as much as digits as its factorization.

51504461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51504461 is about 7176.6608530709. The cubic root of 51504461 is about 372.0616852461.

Adding to 51504461 its reverse (16440515), we get a palindrome (67944976).

The spelling of 51504461 in words is "fifty-one million, five hundred four thousand, four hundred sixty-one".