25705223 has 4 divisors (see below), whose sum is σ = 26591640. Its totient is φ = 24818808.

The previous prime is 25705219. The next prime is 25705249. The reversal of 25705223 is 32250752.

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 25705223 - 2² = 25705219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25705192 and 25705201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705123) 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, 443165 + ... + 443222.

It is an arithmetic number, because the mean of its divisors is an integer number (6647910).

Almost surely, 2^25705223 is an apocalyptic number.

25705223 is a deficient number, since it is larger than the sum of its proper divisors (886417).

25705223 is an equidigital number, since it uses as much as digits as its factorization.

25705223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886416.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 25705223 is about 5070.0318539433. The cubic root of 25705223 is about 295.1257646278.

Adding to 25705223 its reverse (32250752), we get a palindrome (57955975).

The spelling of 25705223 in words is "twenty-five million, seven hundred five thousand, two hundred twenty-three".