5200520021 has 2 divisors, whose sum is σ = 5200520022. Its totient is φ = 5200520020.

The previous prime is 5200520011. The next prime is 5200520023. The reversal of 5200520021 is 1200250025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5024824996 + 175695025 = 70886^2 + 13255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5200520021 is a prime.

Together with 5200520023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5200520023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600260010 + 2600260011.

It is an arithmetic number, because the mean of its divisors is an integer number (2600260011).

Almost surely, 2^5200520021 is an apocalyptic number.

It is an amenable number.

5200520021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5200520021 is an equidigital number, since it uses as much as digits as its factorization.

5200520021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 5200520021 is about 72114.6311160225. The cubic root of 5200520021 is about 1732.5359603627.

Adding to 5200520021 its reverse (1200250025), we get a palindrome (6400770046).

The spelling of 5200520021 in words is "five billion, two hundred million, five hundred twenty thousand, twenty-one".