30433221 has 24 divisors (see below), whose sum is σ = 54104960. Its totient is φ = 16052256.

The previous prime is 30433211. The next prime is 30433223. The reversal of 30433221 is 12233403.

It is not a de Polignac number, because 30433221 - 2⁶ = 30433157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30433194 and 30433203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30433223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17761 + ... + 19398.

Almost surely, 2^30433221 is an apocalyptic number.

It is an amenable number.

30433221 is a deficient number, since it is larger than the sum of its proper divisors (23671739).

30433221 is a wasteful number, since it uses less digits than its factorization.

30433221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37185 (or 37182 counting only the distinct ones).

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

The square root of 30433221 is about 5516.6313090508. The cubic root of 30433221 is about 312.2117952968.

Adding to 30433221 its reverse (12233403), we get a palindrome (42666624).

The spelling of 30433221 in words is "thirty million, four hundred thirty-three thousand, two hundred twenty-one".