25645223 has 4 divisors (see below), whose sum is σ = 25760448. Its totient is φ = 25530000.

The previous prime is 25645211. The next prime is 25645241. The reversal of 25645223 is 32254652.

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 25645223 - 2⁶ = 25645159 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 (25645723) 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, 57278 + ... + 57723.

It is an arithmetic number, because the mean of its divisors is an integer number (6440112).

Almost surely, 2^25645223 is an apocalyptic number.

25645223 is a deficient number, since it is larger than the sum of its proper divisors (115225).

25645223 is a wasteful number, since it uses less digits than its factorization.

25645223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115224.

The product of its digits is 14400, while the sum is 29.

The square root of 25645223 is about 5064.1112744489. Note that the first 3 decimals coincide. The cubic root of 25645223 is about 294.8959625474.

Adding to 25645223 its reverse (32254652), we get a palindrome (57899875).

The spelling of 25645223 in words is "twenty-five million, six hundred forty-five thousand, two hundred twenty-three".