30128227 has 4 divisors (see below), whose sum is σ = 30140656. Its totient is φ = 30115800.

The previous prime is 30128209. The next prime is 30128239. The reversal of 30128227 is 72282103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30128227 - 2⁷ = 30128099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30528227) 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, 1263 + ... + 7864.

It is an arithmetic number, because the mean of its divisors is an integer number (7535164).

Almost surely, 2^30128227 is an apocalyptic number.

30128227 is a deficient number, since it is larger than the sum of its proper divisors (12429).

30128227 is an equidigital number, since it uses as much as digits as its factorization.

30128227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 30128227 is about 5488.9185637974. The cubic root of 30128227 is about 311.1653225778.

The spelling of 30128227 in words is "thirty million, one hundred twenty-eight thousand, two hundred twenty-seven".