25523543 has 4 divisors (see below), whose sum is σ = 25542720. Its totient is φ = 25504368.

The previous prime is 25523539. The next prime is 25523569. The reversal of 25523543 is 34532552.

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

It is a cyclic number.

It is not a de Polignac number, because 25523543 - 2² = 25523539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523573) 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, 7430 + ... + 10307.

It is an arithmetic number, because the mean of its divisors is an integer number (6385680).

Almost surely, 2^25523543 is an apocalyptic number.

25523543 is a deficient number, since it is larger than the sum of its proper divisors (19177).

25523543 is a wasteful number, since it uses less digits than its factorization.

25523543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19176.

The product of its digits is 18000, while the sum is 29.

The square root of 25523543 is about 5052.0830357388. The cubic root of 25523543 is about 294.4288210636.

Subtracting 25523543 from its reverse (34532552), we obtain a palindrome (9009009).

The spelling of 25523543 in words is "twenty-five million, five hundred twenty-three thousand, five hundred forty-three".