51007613 has 2 divisors, whose sum is σ = 51007614. Its totient is φ = 51007612.

The previous prime is 51007577. The next prime is 51007631. The reversal of 51007613 is 31670015.

Together with next prime (51007631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49042009 + 1965604 = 7003^2 + 1402^2 .

It is a cyclic number.

It is not a de Polignac number, because 51007613 - 2⁸ = 51007357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51007673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25503806 + 25503807.

It is an arithmetic number, because the mean of its divisors is an integer number (25503807).

Almost surely, 2^51007613 is an apocalyptic number.

It is an amenable number.

51007613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51007613 is an equidigital number, since it uses as much as digits as its factorization.

51007613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 51007613 is about 7141.9614252669. The cubic root of 51007613 is about 370.8614284764.

Adding to 51007613 its reverse (31670015), we get a palindrome (82677628).

The spelling of 51007613 in words is "fifty-one million, seven thousand, six hundred thirteen".