30032221 has 4 divisors (see below), whose sum is σ = 30073600. Its totient is φ = 29990844.

The previous prime is 30032209. The next prime is 30032237. The reversal of 30032221 is 12223003.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30032221 - 2⁹ = 30031709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30032021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19581 + ... + 21058.

It is an arithmetic number, because the mean of its divisors is an integer number (7518400).

Almost surely, 2^30032221 is an apocalyptic number.

It is an amenable number.

30032221 is a deficient number, since it is larger than the sum of its proper divisors (41379).

30032221 is an equidigital number, since it uses as much as digits as its factorization.

30032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41378.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30032221 is about 5480.1661471163. The cubic root of 30032221 is about 310.8344531693.

Adding to 30032221 its reverse (12223003), we get a palindrome (42255224).

The spelling of 30032221 in words is "thirty million, thirty-two thousand, two hundred twenty-one".