22003 has 2 divisors, whose sum is σ = 22004.
Its totient is φ = 22002.
The previous prime is 21997. The next prime is 22013. The reversal of 22003 is 30022.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 22003 - 29 = 21491 is a prime.
It is a plaindrome in base 15.
It is not a weakly prime, because it can be changed into another prime (22013) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001 + 11002.
It is an arithmetic number, because the mean of its divisors is an integer number (11002).
222003 is an apocalyptic number.
22003 is a deficient number, since it is larger than the sum of its proper divisors (1).
22003 is an equidigital number, since it uses as much as digits as its factorization.
22003 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 12, while the sum is 7.
The square root of 22003 is about 148.3340823951.
The cubic root of 22003 is about 28.0216669029.
Adding to 22003 its reverse (30022), we get a palindrome (52025).
The spelling of 22003 in words is "twenty-two thousand, three", and thus it is an iban number.