2520605281 has 2 divisors, whose sum is σ = 2520605282. Its totient is φ = 2520605280.

The previous prime is 2520605239. The next prime is 2520605287. The reversal of 2520605281 is 1825060252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2491607056 + 28998225 = 49916^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520605281 - 2⁹ = 2520604769 is a prime.

It is a super-2 number, since 2×2520605281² = 12706901965210177922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2520605287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260302640 + 1260302641.

It is an arithmetic number, because the mean of its divisors is an integer number (1260302641).

Almost surely, 2^2520605281 is an apocalyptic number.

It is an amenable number.

2520605281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520605281 is an equidigital number, since it uses as much as digits as its factorization.

2520605281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 2520605281 is about 50205.6299731415. The cubic root of 2520605281 is about 1360.9273665238.

The spelling of 2520605281 in words is "two billion, five hundred twenty million, six hundred five thousand, two hundred eighty-one".