25316513 has 2 divisors, whose sum is σ = 25316514. Its totient is φ = 25316512.

The previous prime is 25316483. The next prime is 25316527. The reversal of 25316513 is 31561352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13010449 + 12306064 = 3607^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 25316513 - 2¹⁰ = 25315489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25316573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12658256 + 12658257.

It is an arithmetic number, because the mean of its divisors is an integer number (12658257).

Almost surely, 2^25316513 is an apocalyptic number.

It is an amenable number.

25316513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25316513 is an equidigital number, since it uses as much as digits as its factorization.

25316513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 25316513 is about 5031.5517487153. The cubic root of 25316513 is about 293.6305886765.

Adding to 25316513 its reverse (31561352), we get a palindrome (56877865).

The spelling of 25316513 in words is "twenty-five million, three hundred sixteen thousand, five hundred thirteen".