522216163555861 has 2 divisors, whose sum is σ = 522216163555862. Its totient is φ = 522216163555860.

The previous prime is 522216163555847. The next prime is 522216163555897. The reversal of 522216163555861 is 168555361612225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353331193975236 + 168884969580625 = 18797106^2 + 12995575^2 .

It is a cyclic number.

It is not a de Polignac number, because 522216163555861 - 2²¹ = 522216161458709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 522216163555796 and 522216163555805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522216163555831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261108081777930 + 261108081777931.

It is an arithmetic number, because the mean of its divisors is an integer number (261108081777931).

Almost surely, 2^{522216163555861} is an apocalyptic number.

It is an amenable number.

522216163555861 is a deficient number, since it is larger than the sum of its proper divisors (1).

522216163555861 is an equidigital number, since it uses as much as digits as its factorization.

522216163555861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920000, while the sum is 58.

The spelling of 522216163555861 in words is "five hundred twenty-two trillion, two hundred sixteen billion, one hundred sixty-three million, five hundred fifty-five thousand, eight hundred sixty-one".