2516502509 has 2 divisors, whose sum is σ = 2516502510. Its totient is φ = 2516502508.

The previous prime is 2516502413. The next prime is 2516502523. The reversal of 2516502509 is 9052056152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1913800009 + 602702500 = 43747^2 + 24550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516502509 - 2²⁰ = 2515453933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2516502539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258251254 + 1258251255.

It is an arithmetic number, because the mean of its divisors is an integer number (1258251255).

Almost surely, 2^2516502509 is an apocalyptic number.

It is an amenable number.

2516502509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516502509 is an equidigital number, since it uses as much as digits as its factorization.

2516502509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 2516502509 is about 50164.7536523404. The cubic root of 2516502509 is about 1360.1885748102.

The spelling of 2516502509 in words is "two billion, five hundred sixteen million, five hundred two thousand, five hundred nine".