2021533 has 2 divisors, whose sum is σ = 2021534. Its totient is φ = 2021532.

The previous prime is 2021527. The next prime is 2021549. The reversal of 2021533 is 3351202.

It is an a-pointer prime, because the next prime (2021549) can be obtained adding 2021533 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1996569 + 24964 = 1413^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021533 - 2⁵ = 2021501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010766 + 1010767.

It is an arithmetic number, because the mean of its divisors is an integer number (1010767).

2^2021533 is an apocalyptic number.

It is an amenable number.

2021533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021533 is an equidigital number, since it uses as much as digits as its factorization.

2021533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 2021533 is about 1421.8062455904. The cubic root of 2021533 is about 126.4426565491.

Adding to 2021533 its reverse (3351202), we get a palindrome (5372735).

The spelling of 2021533 in words is "two million, twenty-one thousand, five hundred thirty-three".