51701917 has 2 divisors, whose sum is σ = 51701918. Its totient is φ = 51701916.

The previous prime is 51701857. The next prime is 51701921. The reversal of 51701917 is 71910715.

51701917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29224836 + 22477081 = 5406^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 51701917 - 2⁷ = 51701789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51701317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25850958 + 25850959.

It is an arithmetic number, because the mean of its divisors is an integer number (25850959).

Almost surely, 2^51701917 is an apocalyptic number.

It is an amenable number.

51701917 is a deficient number, since it is larger than the sum of its proper divisors (1).

51701917 is an equidigital number, since it uses as much as digits as its factorization.

51701917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 51701917 is about 7190.4045087881. The cubic root of 51701917 is about 372.5365446182.

The spelling of 51701917 in words is "fifty-one million, seven hundred one thousand, nine hundred seventeen".