25330125521 has 2 divisors, whose sum is σ = 25330125522. Its totient is φ = 25330125520.

The previous prime is 25330125517. The next prime is 25330125551. The reversal of 25330125521 is 12552103352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23152969921 + 2177155600 = 152161^2 + 46660^2 .

It is a cyclic number.

It is not a de Polignac number, because 25330125521 - 2² = 25330125517 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 (25330125551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12665062760 + 12665062761.

It is an arithmetic number, because the mean of its divisors is an integer number (12665062761).

Almost surely, 2^25330125521 is an apocalyptic number.

It is an amenable number.

25330125521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25330125521 is an equidigital number, since it uses as much as digits as its factorization.

25330125521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 25330125521 its reverse (12552103352), we get a palindrome (37882228873).

The spelling of 25330125521 in words is "twenty-five billion, three hundred thirty million, one hundred twenty-five thousand, five hundred twenty-one".