2021333549 has 2 divisors, whose sum is σ = 2021333550. Its totient is φ = 2021333548.

The previous prime is 2021333543. The next prime is 2021333591. The reversal of 2021333549 is 9453331202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1927824649 + 93508900 = 43907^2 + 9670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021333549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021333543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010666774 + 1010666775.

It is an arithmetic number, because the mean of its divisors is an integer number (1010666775).

Almost surely, 2^2021333549 is an apocalyptic number.

It is an amenable number.

2021333549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021333549 is an equidigital number, since it uses as much as digits as its factorization.

2021333549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 2021333549 is about 44959.2431987016. The cubic root of 2021333549 is about 1264.3849799820.

The spelling of 2021333549 in words is "two billion, twenty-one million, three hundred thirty-three thousand, five hundred forty-nine".