30028231 has 2 divisors, whose sum is σ = 30028232. Its totient is φ = 30028230.

The previous prime is 30028223. The next prime is 30028237. The reversal of 30028231 is 13282003.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30028231 - 2³ = 30028223 is a prime.

It is a super-2 number, since 2×30028231² = 1803389313978722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30028199 and 30028208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30028237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15014115 + 15014116.

It is an arithmetic number, because the mean of its divisors is an integer number (15014116).

Almost surely, 2^30028231 is an apocalyptic number.

30028231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30028231 is an equidigital number, since it uses as much as digits as its factorization.

30028231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30028231 is about 5479.8020949666. The cubic root of 30028231 is about 310.8206870169.

The spelling of 30028231 in words is "thirty million, twenty-eight thousand, two hundred thirty-one".