51510013 has 2 divisors, whose sum is σ = 51510014. Its totient is φ = 51510012.

The previous prime is 51509999. The next prime is 51510023. The reversal of 51510013 is 31001515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30880249 + 20629764 = 5557^2 + 4542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51510013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51510023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25755006 + 25755007.

It is an arithmetic number, because the mean of its divisors is an integer number (25755007).

Almost surely, 2^51510013 is an apocalyptic number.

It is an amenable number.

51510013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51510013 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 12 representation: 51510013 = (15301051)₁₂.

51510013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 51510013 is about 7177.0476520642. The cubic root of 51510013 is about 372.0750537468.

Adding to 51510013 its reverse (31001515), we get a palindrome (82511528).

The spelling of 51510013 in words is "fifty-one million, five hundred ten thousand, thirteen".