4522020521 has 2 divisors, whose sum is σ = 4522020522. Its totient is φ = 4522020520.

The previous prime is 4522020509. The next prime is 4522020563. The reversal of 4522020521 is 1250202254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3561702400 + 960318121 = 59680^2 + 30989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4522020521 is a prime.

It is a super-2 number, since 2×4522020521² = 40897339184690222882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4522022521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2261010260 + 2261010261.

It is an arithmetic number, because the mean of its divisors is an integer number (2261010261).

Almost surely, 2^4522020521 is an apocalyptic number.

It is an amenable number.

4522020521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4522020521 is an equidigital number, since it uses as much as digits as its factorization.

4522020521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4522020521 is about 67245.9702956244. The cubic root of 4522020521 is about 1653.6522125418.

Adding to 4522020521 its reverse (1250202254), we get a palindrome (5772222775).

The spelling of 4522020521 in words is "four billion, five hundred twenty-two million, twenty thousand, five hundred twenty-one".