2521280717 has 2 divisors, whose sum is σ = 2521280718. Its totient is φ = 2521280716.

The previous prime is 2521280681. The next prime is 2521280719. The reversal of 2521280717 is 7170821252.

2521280717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2255395081 + 265885636 = 47491^2 + 16306^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521280717 - 2⁶ = 2521280653 is a prime.

Together with 2521280719, 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 (2521280719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260640358 + 1260640359.

It is an arithmetic number, because the mean of its divisors is an integer number (1260640359).

Almost surely, 2^2521280717 is an apocalyptic number.

It is an amenable number.

2521280717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521280717 is an equidigital number, since it uses as much as digits as its factorization.

2521280717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 2521280717 is about 50212.3562183652. The cubic root of 2521280717 is about 1361.0489163289.

The spelling of 2521280717 in words is "two billion, five hundred twenty-one million, two hundred eighty thousand, seven hundred seventeen".