25213232240 has 120 divisors (see below), whose sum is σ = 68683572720. Its totient is φ = 8582160384.

The previous prime is 25213232179. The next prime is 25213232243. The reversal of 25213232240 is 4223231252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25213232243) 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, 521744 + ... + 568016.

It is an arithmetic number, because the mean of its divisors is an integer number (572363106).

Almost surely, 2^25213232240 is an apocalyptic number.

25213232240 is a gapful number since it is divisible by the number (20) 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 25213232240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34341786360).

25213232240 is an abundant number, since it is smaller than the sum of its proper divisors (43470340480).

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

25213232240 is a wasteful number, since it uses less digits than its factorization.

25213232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46439 (or 46426 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 25213232240 its reverse (4223231252), we get a palindrome (29436463492).

The spelling of 25213232240 in words is "twenty-five billion, two hundred thirteen million, two hundred thirty-two thousand, two hundred forty".