521072056117 has 2 divisors, whose sum is σ = 521072056118. Its totient is φ = 521072056116.

The previous prime is 521072056079. The next prime is 521072056129. The reversal of 521072056117 is 711650270125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357501151396 + 163570904721 = 597914^2 + 404439^2 .

It is a cyclic number.

It is not a de Polignac number, because 521072056117 - 2⁷ = 521072055989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521072056177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260536028058 + 260536028059.

It is an arithmetic number, because the mean of its divisors is an integer number (260536028059).

Almost surely, 2^521072056117 is an apocalyptic number.

It is an amenable number.

521072056117 is a deficient number, since it is larger than the sum of its proper divisors (1).

521072056117 is an equidigital number, since it uses as much as digits as its factorization.

521072056117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 521072056117 in words is "five hundred twenty-one billion, seventy-two million, fifty-six thousand, one hundred seventeen".