23312225 has 12 divisors (see below), whose sum is σ = 30164736. Its totient is φ = 17838480.

The previous prime is 23312147. The next prime is 23312227. The reversal of 23312225 is 52221332.

It is not a de Polignac number, because 23312225 - 2¹⁶ = 23246689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23312197 and 23312206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19697 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (2513728).

Almost surely, 2^23312225 is an apocalyptic number.

23312225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23312225 is a deficient number, since it is larger than the sum of its proper divisors (6852511).

23312225 is a wasteful number, since it uses less digits than its factorization.

23312225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40576 (or 40571 counting only the distinct ones).

The product of its digits is 720, while the sum is 20.

The square root of 23312225 is about 4828.2735009525. The cubic root of 23312225 is about 285.6677683197.

Adding to 23312225 its reverse (52221332), we get a palindrome (75533557).

The spelling of 23312225 in words is "twenty-three million, three hundred twelve thousand, two hundred twenty-five".