25255244317 has 2 divisors, whose sum is σ = 25255244318. Its totient is φ = 25255244316.

The previous prime is 25255244213. The next prime is 25255244321. The reversal of 25255244317 is 71344255252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15568551076 + 9686693241 = 124774^2 + 98421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25255244317 is a prime.

It is a super-2 number, since 2×25255244317² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25255244317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25255244617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627622158 + 12627622159.

It is an arithmetic number, because the mean of its divisors is an integer number (12627622159).

Almost surely, 2^25255244317 is an apocalyptic number.

It is an amenable number.

25255244317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255244317 is an equidigital number, since it uses as much as digits as its factorization.

25255244317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 40.

Adding to 25255244317 its reverse (71344255252), we get a palindrome (96599499569).

The spelling of 25255244317 in words is "twenty-five billion, two hundred fifty-five million, two hundred forty-four thousand, three hundred seventeen".