23221033 has 16 divisors (see below), whose sum is σ = 25945920. Its totient is φ = 20606400.

The previous prime is 23221019. The next prime is 23221063. The reversal of 23221033 is 33012232.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23220998 and 23221016.

It is not an unprimeable number, because it can be changed into a prime (23221063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128203 + ... + 128383.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 2^23221033 is an apocalyptic number.

It is an amenable number.

23221033 is a deficient number, since it is larger than the sum of its proper divisors (2724887).

23221033 is a wasteful number, since it uses less digits than its factorization.

23221033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23221033 is about 4818.8207063554. The cubic root of 23221033 is about 285.2947929513.

Adding to 23221033 its reverse (33012232), we get a palindrome (56233265).

The spelling of 23221033 in words is "twenty-three million, two hundred twenty-one thousand, thirty-three".