25543423 has 4 divisors (see below), whose sum is σ = 25564000. Its totient is φ = 25522848.

The previous prime is 25543393. The next prime is 25543439. The reversal of 25543423 is 32434552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25543423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25543391 and 25543400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8298 + ... + 10951.

It is an arithmetic number, because the mean of its divisors is an integer number (6391000).

Almost surely, 2^25543423 is an apocalyptic number.

25543423 is a deficient number, since it is larger than the sum of its proper divisors (20577).

25543423 is a wasteful number, since it uses less digits than its factorization.

25543423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20576.

The product of its digits is 14400, while the sum is 28.

The square root of 25543423 is about 5054.0501580416. The cubic root of 25543423 is about 294.5052436557.

Adding to 25543423 its reverse (32434552), we get a palindrome (57977975).

The spelling of 25543423 in words is "twenty-five million, five hundred forty-three thousand, four hundred twenty-three".