25505823 has 20 divisors (see below), whose sum is σ = 39684568. Its totient is φ = 14570640.

The previous prime is 25505807. The next prime is 25505849. The reversal of 25505823 is 32850552.

It is not a de Polignac number, because 25505823 - 2⁴ = 25505807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5433 + ... + 8973.

Almost surely, 2^25505823 is an apocalyptic number.

25505823 is a deficient number, since it is larger than the sum of its proper divisors (14178745).

25505823 is an frugal number, since it uses more digits than its factorization.

25505823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572 (or 3551 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 25505823 is about 5050.3289991841. The cubic root of 25505823 is about 294.3606684753.

The spelling of 25505823 in words is "twenty-five million, five hundred five thousand, eight hundred twenty-three".