51520553017 has 2 divisors, whose sum is σ = 51520553018. Its totient is φ = 51520553016.

The previous prime is 51520553003. The next prime is 51520553041. The reversal of 51520553017 is 71035502515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44142430201 + 7378122816 = 210101^2 + 85896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51520553017 is a prime.

It is not a weakly prime, because it can be changed into another prime (51520553417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760276508 + 25760276509.

It is an arithmetic number, because the mean of its divisors is an integer number (25760276509).

Almost surely, 2^51520553017 is an apocalyptic number.

It is an amenable number.

51520553017 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520553017 is an equidigital number, since it uses as much as digits as its factorization.

51520553017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26250, while the sum is 34.

The spelling of 51520553017 in words is "fifty-one billion, five hundred twenty million, five hundred fifty-three thousand, seventeen".