22333021 has 4 divisors (see below), whose sum is σ = 22374844. Its totient is φ = 22291200.

The previous prime is 22333013. The next prime is 22333027. The reversal of 22333021 is 12033322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 13060996 = 3045^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 22333021 - 2³ = 22333013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22332986 and 22333004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22333027) 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, 20100 + ... + 21181.

It is an arithmetic number, because the mean of its divisors is an integer number (5593711).

Almost surely, 2^22333021 is an apocalyptic number.

It is an amenable number.

22333021 is a deficient number, since it is larger than the sum of its proper divisors (41823).

22333021 is an equidigital number, since it uses as much as digits as its factorization.

22333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41822.

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

The square root of 22333021 is about 4725.7825806950. The cubic root of 22333021 is about 281.6107038817.

Adding to 22333021 its reverse (12033322), we get a palindrome (34366343).

The spelling of 22333021 in words is "twenty-two million, three hundred thirty-three thousand, twenty-one".