25515313105201 has 4 divisors (see below), whose sum is σ = 25515323810404. Its totient is φ = 25515302400000.

The previous prime is 25515313105199. The next prime is 25515313105223. The reversal of 25515313105201 is 10250131351552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9768900274576 + 15746412830625 = 3125524^2 + 3968175^2 .

It is a cyclic number.

It is not a de Polignac number, because 25515313105201 - 2¹ = 25515313105199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25515313105241) 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 in 3 ways as a sum of consecutive naturals, for example, 20401 + ... + 7143601.

It is an arithmetic number, because the mean of its divisors is an integer number (6378830952601).

Almost surely, 2^{25515313105201} is an apocalyptic number.

It is an amenable number.

25515313105201 is a deficient number, since it is larger than the sum of its proper divisors (10705203).

25515313105201 is an equidigital number, since it uses as much as digits as its factorization.

25515313105201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705202.

The product of its (nonzero) digits is 22500, while the sum is 34.

Adding to 25515313105201 its reverse (10250131351552), we get a palindrome (35765444456753).

The spelling of 25515313105201 in words is "twenty-five trillion, five hundred fifteen billion, three hundred thirteen million, one hundred five thousand, two hundred one".