51355555573117 has 2 divisors, whose sum is σ = 51355555573118. Its totient is φ = 51355555573116.

The previous prime is 51355555573031. The next prime is 51355555573181. The reversal of 51355555573117 is 71137555555315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37177664827801 + 14177890745316 = 6097349^2 + 3765354^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355555573117 - 2⁷ = 51355555572989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355555579117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677777786558 + 25677777786559.

It is an arithmetic number, because the mean of its divisors is an integer number (25677777786559).

Almost surely, 2^{51355555573117} is an apocalyptic number.

It is an amenable number.

51355555573117 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355555573117 is an equidigital number, since it uses as much as digits as its factorization.

51355555573117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34453125, while the sum is 58.

The spelling of 51355555573117 in words is "fifty-one trillion, three hundred fifty-five billion, five hundred fifty-five million, five hundred seventy-three thousand, one hundred seventeen".