566143023221 has 2 divisors, whose sum is σ = 566143023222. Its totient is φ = 566143023220.

The previous prime is 566143023211. The next prime is 566143023263. The reversal of 566143023221 is 122320341665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498965640625 + 67177382596 = 706375^2 + 259186^2 .

It is a cyclic number.

It is not a de Polignac number, because 566143023221 - 2³⁸ = 291265116277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566143023211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283071511610 + 283071511611.

It is an arithmetic number, because the mean of its divisors is an integer number (283071511611).

Almost surely, 2^566143023221 is an apocalyptic number.

It is an amenable number.

566143023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

566143023221 is an equidigital number, since it uses as much as digits as its factorization.

566143023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 566143023221 its reverse (122320341665), we get a palindrome (688463364886).

The spelling of 566143023221 in words is "five hundred sixty-six billion, one hundred forty-three million, twenty-three thousand, two hundred twenty-one".