533243021 has 2 divisors, whose sum is σ = 533243022. Its totient is φ = 533243020.

The previous prime is 533242993. The next prime is 533243023. The reversal of 533243021 is 120342335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507375625 + 25867396 = 22525^2 + 5086^2 .

It is a cyclic number.

It is not a de Polignac number, because 533243021 - 2¹⁰ = 533241997 is a prime.

Together with 533243023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (533243023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266621510 + 266621511.

It is an arithmetic number, because the mean of its divisors is an integer number (266621511).

Almost surely, 2^533243021 is an apocalyptic number.

It is an amenable number.

533243021 is a deficient number, since it is larger than the sum of its proper divisors (1).

533243021 is an equidigital number, since it uses as much as digits as its factorization.

533243021 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 23.

The square root of 533243021 is about 23092.0553654282. The cubic root of 533243021 is about 810.9144886713.

Adding to 533243021 its reverse (120342335), we get a palindrome (653585356).

The spelling of 533243021 in words is "five hundred thirty-three million, two hundred forty-three thousand, twenty-one".