51051317 has 2 divisors, whose sum is σ = 51051318. Its totient is φ = 51051316.

The previous prime is 51051311. The next prime is 51051361. The reversal of 51051317 is 71315015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 271441 = 7126^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051317 - 2²⁰ = 50002741 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51051292 and 51051301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51051311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25525658 + 25525659.

It is an arithmetic number, because the mean of its divisors is an integer number (25525659).

Almost surely, 2^51051317 is an apocalyptic number.

It is an amenable number.

51051317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51051317 is an equidigital number, since it uses as much as digits as its factorization.

51051317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 51051317 is about 7145.0204338406. The cubic root of 51051317 is about 370.9673179048.

The spelling of 51051317 in words is "fifty-one million, fifty-one thousand, three hundred seventeen".