25251030305240 has 128 divisors (see below), whose sum is σ = 58451867611200. Its totient is φ = 9810345093120.

The previous prime is 25251030305239. The next prime is 25251030305257. The reversal of 25251030305240 is 4250303015252.

It is a super-2 number, since 2×25251030305240² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25251030305197 and 25251030305206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2721891482 + ... + 2721900758.

Almost surely, 2^{25251030305240} is an apocalyptic number.

25251030305240 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 25251030305240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29225933805600).

25251030305240 is an abundant number, since it is smaller than the sum of its proper divisors (33200837305960).

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

25251030305240 is a wasteful number, since it uses less digits than its factorization.

25251030305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12325 (or 12321 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 25251030305240 in words is "twenty-five trillion, two hundred fifty-one billion, thirty million, three hundred five thousand, two hundred forty".