2820713521 has 2 divisors, whose sum is σ = 2820713522. Its totient is φ = 2820713520.

The previous prime is 2820713513. The next prime is 2820713543. The reversal of 2820713521 is 1253170282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2769390625 + 51322896 = 52625^2 + 7164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820713521 - 2³ = 2820713513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2820713501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410356760 + 1410356761.

It is an arithmetic number, because the mean of its divisors is an integer number (1410356761).

Almost surely, 2^2820713521 is an apocalyptic number.

It is an amenable number.

2820713521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820713521 is an equidigital number, since it uses as much as digits as its factorization.

2820713521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2820713521 is about 53110.3899533792. The cubic root of 2820713521 is about 1412.9267912907.

The spelling of 2820713521 in words is "two billion, eight hundred twenty million, seven hundred thirteen thousand, five hundred twenty-one".