25054133243521 has 2 divisors, whose sum is σ = 25054133243522. Its totient is φ = 25054133243520.

The previous prime is 25054133243417. The next prime is 25054133243593. The reversal of 25054133243521 is 12534233145052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15977320042896 + 9076813200625 = 3997164^2 + 3012775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25054133243521 is a prime.

It is not a weakly prime, because it can be changed into another prime (25054133243921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12527066621760 + 12527066621761.

It is an arithmetic number, because the mean of its divisors is an integer number (12527066621761).

Almost surely, 2^{25054133243521} is an apocalyptic number.

It is an amenable number.

25054133243521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25054133243521 is an equidigital number, since it uses as much as digits as its factorization.

25054133243521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 25054133243521 its reverse (12534233145052), we get a palindrome (37588366388573).

The spelling of 25054133243521 in words is "twenty-five trillion, fifty-four billion, one hundred thirty-three million, two hundred forty-three thousand, five hundred twenty-one".