25530013 has 2 divisors, whose sum is σ = 25530014. Its totient is φ = 25530012.

The previous prime is 25530007. The next prime is 25530061. The reversal of 25530013 is 31003552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 9872164 = 3957^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 25530013 - 2⁹ = 25529501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25530083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765006 + 12765007.

It is an arithmetic number, because the mean of its divisors is an integer number (12765007).

Almost surely, 2^25530013 is an apocalyptic number.

It is an amenable number.

25530013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530013 is an equidigital number, since it uses as much as digits as its factorization.

25530013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 25530013 is about 5052.7233250990. The cubic root of 25530013 is about 294.4536973583.

Adding to 25530013 its reverse (31003552), we get a palindrome (56533565).

The spelling of 25530013 in words is "twenty-five million, five hundred thirty thousand, thirteen".