25305225132 has 72 divisors (see below), whose sum is σ = 64994227200. Its totient is φ = 7657268960.

The previous prime is 25305225131. The next prime is 25305225149. The reversal of 25305225132 is 23152250352.

It is a self number, because there is not a number n which added to its sum of digits gives 25305225132.

It is not an unprimeable number, because it can be changed into a prime (25305225131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1031869 + ... + 1056107.

It is an arithmetic number, because the mean of its divisors is an integer number (902697600).

Almost surely, 2^25305225132 is an apocalyptic number.

25305225132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25305225132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32497113600).

25305225132 is an abundant number, since it is smaller than the sum of its proper divisors (39689002068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25305225132 is a wasteful number, since it uses less digits than its factorization.

25305225132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24987 (or 24974 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 25305225132 its reverse (23152250352), we get a palindrome (48457475484).

The spelling of 25305225132 in words is "twenty-five billion, three hundred five million, two hundred twenty-five thousand, one hundred thirty-two".