21883223 has 4 divisors (see below), whose sum is σ = 22296168. Its totient is φ = 21470280.

The previous prime is 21883207. The next prime is 21883249. The reversal of 21883223 is 32238812.

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

It is a cyclic number.

It is not a de Polignac number, because 21883223 - 2⁴ = 21883207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883273) 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, 206393 + ... + 206498.

It is an arithmetic number, because the mean of its divisors is an integer number (5574042).

Almost surely, 2^21883223 is an apocalyptic number.

21883223 is a deficient number, since it is larger than the sum of its proper divisors (412945).

21883223 is an equidigital number, since it uses as much as digits as its factorization.

21883223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412944.

The product of its digits is 4608, while the sum is 29.

The square root of 21883223 is about 4677.9507265468. The cubic root of 21883223 is about 279.7072748604.

The spelling of 21883223 in words is "twenty-one million, eight hundred eighty-three thousand, two hundred twenty-three".