23228321 has 4 divisors (see below), whose sum is σ = 24238272. Its totient is φ = 22218372.

The previous prime is 23228311. The next prime is 23228323. The reversal of 23228321 is 12382232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23228321 - 2²² = 19034017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1009927 = 23228321 / (2 + 3 + 2 + 2 + 8 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23228323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504941 + ... + 504986.

It is an arithmetic number, because the mean of its divisors is an integer number (6059568).

Almost surely, 2^23228321 is an apocalyptic number.

It is an amenable number.

23228321 is a deficient number, since it is larger than the sum of its proper divisors (1009951).

23228321 is a wasteful number, since it uses less digits than its factorization.

23228321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009950.

The product of its digits is 1152, while the sum is 23.

The square root of 23228321 is about 4819.5768486455. The cubic root of 23228321 is about 285.3246367423.

The spelling of 23228321 in words is "twenty-three million, two hundred twenty-eight thousand, three hundred twenty-one".