51276817 has 2 divisors, whose sum is σ = 51276818. Its totient is φ = 51276816.

The previous prime is 51276793. The next prime is 51276853. The reversal of 51276817 is 71867215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29149201 + 22127616 = 5399^2 + 4704^2 .

It is a cyclic number.

It is not a de Polignac number, because 51276817 - 2⁷ = 51276689 is a prime.

It is not a weakly prime, because it can be changed into another prime (51276217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638408 + 25638409.

It is an arithmetic number, because the mean of its divisors is an integer number (25638409).

Almost surely, 2^51276817 is an apocalyptic number.

It is an amenable number.

51276817 is a deficient number, since it is larger than the sum of its proper divisors (1).

51276817 is an equidigital number, since it uses as much as digits as its factorization.

51276817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 37.

The square root of 51276817 is about 7160.7832672132. The cubic root of 51276817 is about 371.5127185442.

The spelling of 51276817 in words is "fifty-one million, two hundred seventy-six thousand, eight hundred seventeen".