30043021 has 2 divisors, whose sum is σ = 30043022. Its totient is φ = 30043020.

The previous prime is 30042983. The next prime is 30043033. The reversal of 30043021 is 12034003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 5152900 = 4989^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 30043021 - 2¹¹ = 30040973 is a prime.

It is a super-2 number, since 2×30043021² = 1805166221612882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30042992 and 30043010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30043081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15021510 + 15021511.

It is an arithmetic number, because the mean of its divisors is an integer number (15021511).

Almost surely, 2^30043021 is an apocalyptic number.

It is an amenable number.

30043021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30043021 is an equidigital number, since it uses as much as digits as its factorization.

30043021 is an evil number, because the sum of its binary digits is even.

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

The square root of 30043021 is about 5481.1514301285. The cubic root of 30043021 is about 310.8717088196.

Adding to 30043021 its reverse (12034003), we get a palindrome (42077024).

The spelling of 30043021 in words is "thirty million, forty-three thousand, twenty-one".