22232021 has 4 divisors (see below), whose sum is σ = 25408032. Its totient is φ = 19056012.

The previous prime is 22232011. The next prime is 22232029. The reversal of 22232021 is 12023222.

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 22232021 - 2¹⁰ = 22230997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22231987 and 22232005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22232029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587995 + ... + 1588008.

It is an arithmetic number, because the mean of its divisors is an integer number (6352008).

Almost surely, 2^22232021 is an apocalyptic number.

It is an amenable number.

22232021 is a deficient number, since it is larger than the sum of its proper divisors (3176011).

22232021 is an equidigital number, since it uses as much as digits as its factorization.

22232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176010.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22232021 is about 4715.0844106972. The cubic root of 22232021 is about 281.1855387413.

Adding to 22232021 its reverse (12023222), we get a palindrome (34255243).

The spelling of 22232021 in words is "twenty-two million, two hundred thirty-two thousand, twenty-one".