25204441321 has 2 divisors, whose sum is σ = 25204441322. Its totient is φ = 25204441320.

The previous prime is 25204441313. The next prime is 25204441333. The reversal of 25204441321 is 12314440252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21825925696 + 3378515625 = 147736^2 + 58125^2 .

It is a cyclic number.

It is not a de Polignac number, because 25204441321 - 2³ = 25204441313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25204441321.

It is not a weakly prime, because it can be changed into another prime (25204441421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12602220660 + 12602220661.

It is an arithmetic number, because the mean of its divisors is an integer number (12602220661).

Almost surely, 2^25204441321 is an apocalyptic number.

It is an amenable number.

25204441321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25204441321 is an equidigital number, since it uses as much as digits as its factorization.

25204441321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 25204441321 its reverse (12314440252), we get a palindrome (37518881573).

The spelling of 25204441321 in words is "twenty-five billion, two hundred four million, four hundred forty-one thousand, three hundred twenty-one".