25231235400 has 384 divisors, whose sum is σ = 102752352000. Its totient is φ = 5568030720.

The previous prime is 25231235399. The next prime is 25231235437. The reversal of 25231235400 is 453213252.

It is a happy number.

25231235400 is a `hidden beast` number, since 2 + 5 + 23 + 1 + 235 + 400 = 666.

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

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 95 ways as a sum of consecutive naturals, for example, 1084692 + ... + 1107708.

It is an arithmetic number, because the mean of its divisors is an integer number (267584250).

Almost surely, 2^25231235400 is an apocalyptic number.

25231235400 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 25231235400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51376176000).

25231235400 is an abundant number, since it is smaller than the sum of its proper divisors (77521116600).

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

25231235400 is a wasteful number, since it uses less digits than its factorization.

25231235400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078 (or 23063 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 25231235400 its reverse (453213252), we get a palindrome (25684448652).

The spelling of 25231235400 in words is "twenty-five billion, two hundred thirty-one million, two hundred thirty-five thousand, four hundred".