21233043 has 16 divisors (see below), whose sum is σ = 33876640. Its totient is φ = 13066272.

The previous prime is 21233029. The next prime is 21233059. The reversal of 21233043 is 34033212.

It is not a de Polignac number, because 21233043 - 2⁴ = 21233027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29896 + ... + 30597.

It is an arithmetic number, because the mean of its divisors is an integer number (2117290).

Almost surely, 2^21233043 is an apocalyptic number.

21233043 is a deficient number, since it is larger than the sum of its proper divisors (12643597).

21233043 is a wasteful number, since it uses less digits than its factorization.

21233043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60515 (or 60509 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 21233043 is about 4607.9326166948. The cubic root of 21233043 is about 276.9092179496.

Adding to 21233043 its reverse (34033212), we get a palindrome (55266255).

The spelling of 21233043 in words is "twenty-one million, two hundred thirty-three thousand, forty-three".