2521263517 has 2 divisors, whose sum is σ = 2521263518. Its totient is φ = 2521263516.

The previous prime is 2521263499. The next prime is 2521263587. The reversal of 2521263517 is 7153621252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782021796 + 739241721 = 42214^2 + 27189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521263517 - 2²³ = 2512874909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521263587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260631758 + 1260631759.

It is an arithmetic number, because the mean of its divisors is an integer number (1260631759).

Almost surely, 2^2521263517 is an apocalyptic number.

It is an amenable number.

2521263517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521263517 is an equidigital number, since it uses as much as digits as its factorization.

2521263517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 2521263517 is about 50212.1849454891. The cubic root of 2521263517 is about 1361.0458213285.

Adding to 2521263517 its reverse (7153621252), we get a palindrome (9674884769).

The spelling of 2521263517 in words is "two billion, five hundred twenty-one million, two hundred sixty-three thousand, five hundred seventeen".