5240005021 has 2 divisors, whose sum is σ = 5240005022. Its totient is φ = 5240005020.

The previous prime is 5240005019. The next prime is 5240005033. The reversal of 5240005021 is 1205000425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4315176100 + 924828921 = 65690^2 + 30411^2 .

It is a cyclic number.

It is not a de Polignac number, because 5240005021 - 2¹ = 5240005019 is a prime.

Together with 5240005019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5240005021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5240005321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2620002510 + 2620002511.

It is an arithmetic number, because the mean of its divisors is an integer number (2620002511).

Almost surely, 2^5240005021 is an apocalyptic number.

It is an amenable number.

5240005021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5240005021 is an equidigital number, since it uses as much as digits as its factorization.

5240005021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 5240005021 is about 72387.8789646444. The cubic root of 5240005021 is about 1736.9096753156.

Adding to 5240005021 its reverse (1205000425), we get a palindrome (6445005446).

The spelling of 5240005021 in words is "five billion, two hundred forty million, five thousand, twenty-one".