51445717 has 2 divisors, whose sum is σ = 51445718. Its totient is φ = 51445716.

The previous prime is 51445703. The next prime is 51445727. The reversal of 51445717 is 71754415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 1234321 = 7086^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 51445717 - 2¹¹ = 51443669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51445727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722858 + 25722859.

It is an arithmetic number, because the mean of its divisors is an integer number (25722859).

Almost surely, 2^51445717 is an apocalyptic number.

It is an amenable number.

51445717 is a deficient number, since it is larger than the sum of its proper divisors (1).

51445717 is an equidigital number, since it uses as much as digits as its factorization.

51445717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 34.

The square root of 51445717 is about 7172.5669742429. The cubic root of 51445717 is about 371.9201783682.

The spelling of 51445717 in words is "fifty-one million, four hundred forty-five thousand, seven hundred seventeen".