2521525130809 has 2 divisors, whose sum is σ = 2521525130810. Its totient is φ = 2521525130808.

The previous prime is 2521525130743. The next prime is 2521525130833. The reversal of 2521525130809 is 9080315251252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2455974794025 + 65550336784 = 1567155^2 + 256028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521525130809 - 2¹¹ = 2521525128761 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521525131809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260762565404 + 1260762565405.

It is an arithmetic number, because the mean of its divisors is an integer number (1260762565405).

Almost surely, 2^{2521525130809} is an apocalyptic number.

It is an amenable number.

2521525130809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521525130809 is an equidigital number, since it uses as much as digits as its factorization.

2521525130809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 2521525130809 in words is "two trillion, five hundred twenty-one billion, five hundred twenty-five million, one hundred thirty thousand, eight hundred nine".