25343221765313 has 2 divisors, whose sum is σ = 25343221765314. Its totient is φ = 25343221765312.

The previous prime is 25343221765307. The next prime is 25343221765319. The reversal of 25343221765313 is 31356712234352.

It is a balanced prime because it is at equal distance from previous prime (25343221765307) and next prime (25343221765319).

It can be written as a sum of positive squares in only one way, i.e., 24804264630544 + 538957134769 = 4980388^2 + 734137^2 .

It is a cyclic number.

It is not a de Polignac number, because 25343221765313 - 2¹² = 25343221761217 is a prime.

It is not a weakly prime, because it can be changed into another prime (25343221765319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12671610882656 + 12671610882657.

It is an arithmetic number, because the mean of its divisors is an integer number (12671610882657).

Almost surely, 2^{25343221765313} is an apocalyptic number.

It is an amenable number.

25343221765313 is a deficient number, since it is larger than the sum of its proper divisors (1).

25343221765313 is an equidigital number, since it uses as much as digits as its factorization.

25343221765313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 47.

Adding to 25343221765313 its reverse (31356712234352), we get a palindrome (56699933999665).

The spelling of 25343221765313 in words is "twenty-five trillion, three hundred forty-three billion, two hundred twenty-one million, seven hundred sixty-five thousand, three hundred thirteen".