5202445021 has 2 divisors, whose sum is σ = 5202445022. Its totient is φ = 5202445020.

The previous prime is 5202445019. The next prime is 5202445091. The reversal of 5202445021 is 1205442025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4704039396 + 498405625 = 68586^2 + 22325^2 .

It is a cyclic number.

It is not a de Polignac number, because 5202445021 - 2¹ = 5202445019 is a prime.

Together with 5202445019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5202445091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601222510 + 2601222511.

It is an arithmetic number, because the mean of its divisors is an integer number (2601222511).

Almost surely, 2^5202445021 is an apocalyptic number.

It is an amenable number.

5202445021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5202445021 is an equidigital number, since it uses as much as digits as its factorization.

5202445021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 5202445021 is about 72127.9766872744. The cubic root of 5202445021 is about 1732.7497031095.

Adding to 5202445021 its reverse (1205442025), we get a palindrome (6407887046).

The spelling of 5202445021 in words is "five billion, two hundred two million, four hundred forty-five thousand, twenty-one".