25421231430 has 128 divisors (see below), whose sum is σ = 77518172160. Its totient is φ = 5807272320.

The previous prime is 25421231389. The next prime is 25421231441. The reversal of 25421231430 is 3413212452.

25421231430 is a `hidden beast` number, since 2 + 5 + 421 + 231 + 4 + 3 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 25421231394 and 25421231403.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 5227200 + ... + 5232060.

It is an arithmetic number, because the mean of its divisors is an integer number (605610720).

Almost surely, 2^25421231430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25421231430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38759086080).

25421231430 is an abundant number, since it is smaller than the sum of its proper divisors (52096940730).

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

25421231430 is a wasteful number, since it uses less digits than its factorization.

25421231430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651 (or 7645 counting only the distinct ones).

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

Adding to 25421231430 its reverse (3413212452), we get a palindrome (28834443882).

The spelling of 25421231430 in words is "twenty-five billion, four hundred twenty-one million, two hundred thirty-one thousand, four hundred thirty".