233430021 has 12 divisors (see below), whose sum is σ = 367829280. Its totient is φ = 141472680.

The previous prime is 233430017. The next prime is 233430091. The reversal of 233430021 is 120034332.

233430021 is a `hidden beast` number, since 233 + 430 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 233430021 - 2² = 233430017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233429976 and 233430003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233430091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178841 + ... + 1179038.

It is an arithmetic number, because the mean of its divisors is an integer number (30652440).

Almost surely, 2^233430021 is an apocalyptic number.

It is an amenable number.

233430021 is a deficient number, since it is larger than the sum of its proper divisors (134399259).

233430021 is a wasteful number, since it uses less digits than its factorization.

233430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357896 (or 2357893 counting only the distinct ones).

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

The square root of 233430021 is about 15278.4168355232. The cubic root of 233430021 is about 615.7232735864.

Adding to 233430021 its reverse (120034332), we get a palindrome (353464353).

The spelling of 233430021 in words is "two hundred thirty-three million, four hundred thirty thousand, twenty-one".