533500021 has 2 divisors, whose sum is σ = 533500022. Its totient is φ = 533500020.

The previous prime is 533499977. The next prime is 533500073. The reversal of 533500021 is 120005335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377524900 + 155975121 = 19430^2 + 12489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-533500021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (533500321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266750010 + 266750011.

It is an arithmetic number, because the mean of its divisors is an integer number (266750011).

Almost surely, 2^533500021 is an apocalyptic number.

It is an amenable number.

533500021 is a deficient number, since it is larger than the sum of its proper divisors (1).

533500021 is an equidigital number, since it uses as much as digits as its factorization.

533500021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 533500021 is about 23097.6193794945. The cubic root of 533500021 is about 811.0447429479.

Adding to 533500021 its reverse (120005335), we get a palindrome (653505356).

The spelling of 533500021 in words is "five hundred thirty-three million, five hundred thousand, twenty-one".