51156302317 has 2 divisors, whose sum is σ = 51156302318. Its totient is φ = 51156302316.

The previous prime is 51156302293. The next prime is 51156302339. The reversal of 51156302317 is 71320365115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50692072201 + 464230116 = 225149^2 + 21546^2 .

It is a cyclic number.

It is not a de Polignac number, because 51156302317 - 2¹⁹ = 51155778029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51156302117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25578151158 + 25578151159.

It is an arithmetic number, because the mean of its divisors is an integer number (25578151159).

Almost surely, 2^51156302317 is an apocalyptic number.

It is an amenable number.

51156302317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51156302317 is an equidigital number, since it uses as much as digits as its factorization.

51156302317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 51156302317 in words is "fifty-one billion, one hundred fifty-six million, three hundred two thousand, three hundred seventeen".