25031226240 has 384 divisors, whose sum is σ = 91392163200. Its totient is φ = 6295449600.

The previous prime is 25031226229. The next prime is 25031226247. The reversal of 25031226240 is 4262213052.

It is a happy number.

25031226240 is a `hidden beast` number, since 2 + 5 + 0 + 31 + 2 + 2 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25031226247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36224295 + ... + 36224985.

It is an arithmetic number, because the mean of its divisors is an integer number (238000425).

Almost surely, 2^25031226240 is an apocalyptic number.

25031226240 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 25031226240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45696081600).

25031226240 is an abundant number, since it is smaller than the sum of its proper divisors (66360936960).

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

25031226240 is a wasteful number, since it uses less digits than its factorization.

25031226240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 25031226240 its reverse (4262213052), we get a palindrome (29293439292).

The spelling of 25031226240 in words is "twenty-five billion, thirty-one million, two hundred twenty-six thousand, two hundred forty".