2520479821 has 2 divisors, whose sum is σ = 2520479822. Its totient is φ = 2520479820.

The previous prime is 2520479809. The next prime is 2520479867. The reversal of 2520479821 is 1289740252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2198672100 + 321807721 = 46890^2 + 17939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520479821 - 2⁹ = 2520479309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520479881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260239910 + 1260239911.

It is an arithmetic number, because the mean of its divisors is an integer number (1260239911).

Almost surely, 2^2520479821 is an apocalyptic number.

It is an amenable number.

2520479821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520479821 is an equidigital number, since it uses as much as digits as its factorization.

2520479821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2520479821 is about 50204.3804961280. The cubic root of 2520479821 is about 1360.9047866588.

The spelling of 2520479821 in words is "two billion, five hundred twenty million, four hundred seventy-nine thousand, eight hundred twenty-one".