25731231120 has 480 divisors, whose sum is σ = 103102900992. Its totient is φ = 5842077696.

The previous prime is 25731231101. The next prime is 25731231133. The reversal of 25731231120 is 2113213752.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23541294 + ... + 23542386.

Almost surely, 2^25731231120 is an apocalyptic number.

25731231120 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 25731231120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51551450496).

25731231120 is an abundant number, since it is smaller than the sum of its proper divisors (77371669872).

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

25731231120 is a wasteful number, since it uses less digits than its factorization.

25731231120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 25731231120 its reverse (2113213752), we get a palindrome (27844444872).

The spelling of 25731231120 in words is "twenty-five billion, seven hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty".