25545223321 has 2 divisors, whose sum is σ = 25545223322. Its totient is φ = 25545223320.

The previous prime is 25545223289. The next prime is 25545223339. The reversal of 25545223321 is 12332254552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16317507600 + 9227715721 = 127740^2 + 96061^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545223321 - 2⁵ = 25545223289 is a prime.

It is not a weakly prime, because it can be changed into another prime (25545226321) 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, 12772611660 + 12772611661.

It is an arithmetic number, because the mean of its divisors is an integer number (12772611661).

Almost surely, 2^25545223321 is an apocalyptic number.

It is an amenable number.

25545223321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545223321 is an equidigital number, since it uses as much as digits as its factorization.

25545223321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 34.

Adding to 25545223321 its reverse (12332254552), we get a palindrome (37877477873).

The spelling of 25545223321 in words is "twenty-five billion, five hundred forty-five million, two hundred twenty-three thousand, three hundred twenty-one".