566231021 has 2 divisors, whose sum is σ = 566231022. Its totient is φ = 566231020.

The previous prime is 566231011. The next prime is 566231047. The reversal of 566231021 is 120132665.

It is an a-pointer prime, because the next prime (566231047) can be obtained adding 566231021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441462121 + 124768900 = 21011^2 + 11170^2 .

It is a cyclic number.

It is not a de Polignac number, because 566231021 - 2⁶ = 566230957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566231011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283115510 + 283115511.

It is an arithmetic number, because the mean of its divisors is an integer number (283115511).

Almost surely, 2^566231021 is an apocalyptic number.

It is an amenable number.

566231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

566231021 is an equidigital number, since it uses as much as digits as its factorization.

566231021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 566231021 is about 23795.6092798651. The cubic root of 566231021 is about 827.3029117188.

Adding to 566231021 its reverse (120132665), we get a palindrome (686363686).

The spelling of 566231021 in words is "five hundred sixty-six million, two hundred thirty-one thousand, twenty-one".