6556052021 has 2 divisors, whose sum is σ = 6556052022. Its totient is φ = 6556052020.

The previous prime is 6556051993. The next prime is 6556052051. The reversal of 6556052021 is 1202506556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5942251396 + 613800625 = 77086^2 + 24775^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556052021 - 2¹⁴ = 6556035637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6556052051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278026010 + 3278026011.

It is an arithmetic number, because the mean of its divisors is an integer number (3278026011).

Almost surely, 2^6556052021 is an apocalyptic number.

It is an amenable number.

6556052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556052021 is an equidigital number, since it uses as much as digits as its factorization.

6556052021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 6556052021 is about 80969.4511590637. The cubic root of 6556052021 is about 1871.6047137485.

Adding to 6556052021 its reverse (1202506556), we get a palindrome (7758558577).

The spelling of 6556052021 in words is "six billion, five hundred fifty-six million, fifty-two thousand, twenty-one".