23221265 has 8 divisors (see below), whose sum is σ = 27978048. Its totient is φ = 18502000.

The previous prime is 23221259. The next prime is 23221267. The reversal of 23221265 is 56212232.

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

It is not a de Polignac number, because 23221265 - 2¹² = 23217169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23221265.

It is not an unprimeable number, because it can be changed into a prime (23221267) 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, 7997 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (3497256).

Almost surely, 2^23221265 is an apocalyptic number.

It is an amenable number.

23221265 is a deficient number, since it is larger than the sum of its proper divisors (4756783).

23221265 is a wasteful number, since it uses less digits than its factorization.

23221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18759.

The product of its digits is 1440, while the sum is 23.

The square root of 23221265 is about 4818.8447785750. The cubic root of 23221265 is about 285.2957430694.

Adding to 23221265 its reverse (56212232), we get a palindrome (79433497).

The spelling of 23221265 in words is "twenty-three million, two hundred twenty-one thousand, two hundred sixty-five".