25031322240 has 128 divisors (see below), whose sum is σ = 84480822720. Its totient is φ = 6282362880.

The previous prime is 25031322221. The next prime is 25031322263. The reversal of 25031322240 is 4222313052.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25031322240.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 350806 + ... + 416085.

Almost surely, 2^25031322240 is an apocalyptic number.

25031322240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25031322240 is an abundant number, since it is smaller than the sum of its proper divisors (59449500480).

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

25031322240 is a wasteful number, since it uses less digits than its factorization.

25031322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766930 (or 766918 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 25031322240 its reverse (4222313052), we get a palindrome (29253635292).

The spelling of 25031322240 in words is "twenty-five billion, thirty-one million, three hundred twenty-two thousand, two hundred forty".