25431823 has 4 divisors (see below), whose sum is σ = 26770360. Its totient is φ = 24093288.

The previous prime is 25431817. The next prime is 25431851. The reversal of 25431823 is 32813452.

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-25431823 is a prime.

It is a super-2 number, since 2×25431823² = 1293555242206658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25431791 and 25431800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431853) 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 3 ways as a sum of consecutive naturals, for example, 669240 + ... + 669277.

It is an arithmetic number, because the mean of its divisors is an integer number (6692590).

Almost surely, 2^25431823 is an apocalyptic number.

25431823 is a deficient number, since it is larger than the sum of its proper divisors (1338537).

25431823 is a wasteful number, since it uses less digits than its factorization.

25431823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338536.

The product of its digits is 5760, while the sum is 28.

The square root of 25431823 is about 5042.9974221687. The cubic root of 25431823 is about 294.0757166884.

The spelling of 25431823 in words is "twenty-five million, four hundred thirty-one thousand, eight hundred twenty-three".