25223645 has 8 divisors (see below), whose sum is σ = 30551904. Its totient is φ = 19989904.

The previous prime is 25223641. The next prime is 25223647. The reversal of 25223645 is 54632252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25223645 - 2² = 25223641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23039 + ... + 24108.

It is an arithmetic number, because the mean of its divisors is an integer number (3818988).

Almost surely, 2^25223645 is an apocalyptic number.

It is an amenable number.

25223645 is a deficient number, since it is larger than the sum of its proper divisors (5328259).

25223645 is a wasteful number, since it uses less digits than its factorization.

25223645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47259.

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

The square root of 25223645 is about 5022.3147053923. The cubic root of 25223645 is about 293.2711092475.

Adding to 25223645 its reverse (54632252), we get a palindrome (79855897).

The spelling of 25223645 in words is "twenty-five million, two hundred twenty-three thousand, six hundred forty-five".