51017415370321 has 2 divisors, whose sum is σ = 51017415370322. Its totient is φ = 51017415370320.

The previous prime is 51017415370301. The next prime is 51017415370409. The reversal of 51017415370321 is 12307351471015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40001893337025 + 11015522033296 = 6324705^2 + 3318964^2 .

It is a cyclic number.

It is not a de Polignac number, because 51017415370321 - 2⁴¹ = 48818392114769 is a prime.

It is not a weakly prime, because it can be changed into another prime (51017415370301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25508707685160 + 25508707685161.

It is an arithmetic number, because the mean of its divisors is an integer number (25508707685161).

Almost surely, 2^{51017415370321} is an apocalyptic number.

It is an amenable number.

51017415370321 is a deficient number, since it is larger than the sum of its proper divisors (1).

51017415370321 is an equidigital number, since it uses as much as digits as its factorization.

51017415370321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 51017415370321 in words is "fifty-one trillion, seventeen billion, four hundred fifteen million, three hundred seventy thousand, three hundred twenty-one".