2516252521 has 2 divisors, whose sum is σ = 2516252522. Its totient is φ = 2516252520.

The previous prime is 2516252477. The next prime is 2516252561. The reversal of 2516252521 is 1252526152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2264712921 + 251539600 = 47589^2 + 15860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516252521 - 2¹³ = 2516244329 is a prime.

It is not a weakly prime, because it can be changed into another prime (2516252561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258126260 + 1258126261.

It is an arithmetic number, because the mean of its divisors is an integer number (1258126261).

Almost surely, 2^2516252521 is an apocalyptic number.

It is an amenable number.

2516252521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516252521 is an equidigital number, since it uses as much as digits as its factorization.

2516252521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 2516252521 is about 50162.2619206909. The cubic root of 2516252521 is about 1360.1435331859.

Adding to 2516252521 its reverse (1252526152), we get a palindrome (3768778673).

The spelling of 2516252521 in words is "two billion, five hundred sixteen million, two hundred fifty-two thousand, five hundred twenty-one".