25230343517 has 2 divisors, whose sum is σ = 25230343518. Its totient is φ = 25230343516.

The previous prime is 25230343487. The next prime is 25230343571. The reversal of 25230343517 is 71534303252.

Together with next prime (25230343571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25196482756 + 33860761 = 158734^2 + 5819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25230343517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25230343577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12615171758 + 12615171759.

It is an arithmetic number, because the mean of its divisors is an integer number (12615171759).

Almost surely, 2^25230343517 is an apocalyptic number.

It is an amenable number.

25230343517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25230343517 is an equidigital number, since it uses as much as digits as its factorization.

25230343517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 35.

Adding to 25230343517 its reverse (71534303252), we get a palindrome (96764646769).

The spelling of 25230343517 in words is "twenty-five billion, two hundred thirty million, three hundred forty-three thousand, five hundred seventeen".