25223542251 has 16 divisors (see below), whose sum is σ = 34795407360. Its totient is φ = 16233829920.

The previous prime is 25223542249. The next prime is 25223542271. The reversal of 25223542251 is 15224532252.

It is not a de Polignac number, because 25223542251 - 2¹ = 25223542249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25223542231) 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 15 ways as a sum of consecutive naturals, for example, 1050486 + ... + 1074228.

It is an arithmetic number, because the mean of its divisors is an integer number (2174712960).

Almost surely, 2^25223542251 is an apocalyptic number.

25223542251 is a deficient number, since it is larger than the sum of its proper divisors (9571865109).

25223542251 is a wasteful number, since it uses less digits than its factorization.

25223542251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35986.

The product of its digits is 48000, while the sum is 33.

Subtracting from 25223542251 its reverse (15224532252), we obtain a palindrome (9999009999).

The spelling of 25223542251 in words is "twenty-five billion, two hundred twenty-three million, five hundred forty-two thousand, two hundred fifty-one".