51726617 has 2 divisors, whose sum is σ = 51726618. Its totient is φ = 51726616.

The previous prime is 51726601. The next prime is 51726637. The reversal of 51726617 is 71662715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 732736 = 7141^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 51726617 - 2⁴ = 51726601 is a prime.

It is not a weakly prime, because it can be changed into another prime (51726637) 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, 25863308 + 25863309.

It is an arithmetic number, because the mean of its divisors is an integer number (25863309).

Almost surely, 2^51726617 is an apocalyptic number.

It is an amenable number.

51726617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726617 is an equidigital number, since it uses as much as digits as its factorization.

51726617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The square root of 51726617 is about 7192.1218704914. The cubic root of 51726617 is about 372.5958601990.

The spelling of 51726617 in words is "fifty-one million, seven hundred twenty-six thousand, six hundred seventeen".