25305244243 has 8 divisors (see below), whose sum is σ = 27094843440. Its totient is φ = 23549095680.

The previous prime is 25305244189. The next prime is 25305244301. The reversal of 25305244243 is 34244250352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25305244243 - 2⁹ = 25305243731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25305244199 and 25305244208.

It is not an unprimeable number, because it can be changed into a prime (25305244343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8361093 + ... + 8364118.

It is an arithmetic number, because the mean of its divisors is an integer number (3386855430).

Almost surely, 2^25305244243 is an apocalyptic number.

25305244243 is a deficient number, since it is larger than the sum of its proper divisors (1789599197).

25305244243 is a wasteful number, since it uses less digits than its factorization.

25305244243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16725317.

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 25305244243 its reverse (34244250352), we get a palindrome (59549494595).

The spelling of 25305244243 in words is "twenty-five billion, three hundred five million, two hundred forty-four thousand, two hundred forty-three".