2540521513 has 2 divisors, whose sum is σ = 2540521514. Its totient is φ = 2540521512.

The previous prime is 2540521507. The next prime is 2540521537. The reversal of 2540521513 is 3151250452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2049101289 + 491420224 = 45267^2 + 22168^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540521513 - 2⁹ = 2540521001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2540521573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270260756 + 1270260757.

It is an arithmetic number, because the mean of its divisors is an integer number (1270260757).

Almost surely, 2^2540521513 is an apocalyptic number.

It is an amenable number.

2540521513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540521513 is an equidigital number, since it uses as much as digits as its factorization.

2540521513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2540521513 is about 50403.5863108966. The cubic root of 2540521513 is about 1364.5023635594.

Adding to 2540521513 its reverse (3151250452), we get a palindrome (5691771965).

The spelling of 2540521513 in words is "two billion, five hundred forty million, five hundred twenty-one thousand, five hundred thirteen".