21233230 has 16 divisors (see below), whose sum is σ = 38600064. Its totient is φ = 8408800.

The previous prime is 21233213. The next prime is 21233239. The reversal of 21233230 is 3233212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9502 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (2412504).

Almost surely, 2^21233230 is an apocalyptic number.

21233230 is a deficient number, since it is larger than the sum of its proper divisors (17366834).

21233230 is a wasteful number, since it uses less digits than its factorization.

21233230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21131.

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

The square root of 21233230 is about 4607.9529077455. The cubic root of 21233230 is about 276.9100308629.

Adding to 21233230 its reverse (3233212), we get a palindrome (24466442).

The spelling of 21233230 in words is "twenty-one million, two hundred thirty-three thousand, two hundred thirty".