25525223025 has 24 divisors (see below), whose sum is σ = 42261312960. Its totient is φ = 13594223040.

The previous prime is 25525222999. The next prime is 25525223027. The reversal of 25525223025 is 52032252552.

It is a happy number.

It is not a de Polignac number, because 25525223025 - 2²⁰ = 25524174449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25525223027) 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 23 ways as a sum of consecutive naturals, for example, 186837 + ... + 293186.

It is an arithmetic number, because the mean of its divisors is an integer number (1760888040).

Almost surely, 2^25525223025 is an apocalyptic number.

25525223025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25525223025 is a deficient number, since it is larger than the sum of its proper divisors (16736089935).

25525223025 is a wasteful number, since it uses less digits than its factorization.

25525223025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480745 (or 480740 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 33.

Adding to 25525223025 its reverse (52032252552), we get a palindrome (77557475577).

The spelling of 25525223025 in words is "twenty-five billion, five hundred twenty-five million, two hundred twenty-three thousand, twenty-five".