30143021 has 2 divisors, whose sum is σ = 30143022. Its totient is φ = 30143020.

The previous prime is 30143017. The next prime is 30143051. The reversal of 30143021 is 12034103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 2464900 = 5261^2 + 1570^2 .

It is an emirp because it is prime and its reverse (12034103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30143021 - 2² = 30143017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30142987 and 30143005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30143011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15071510 + 15071511.

It is an arithmetic number, because the mean of its divisors is an integer number (15071511).

Almost surely, 2^30143021 is an apocalyptic number.

It is an amenable number.

30143021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30143021 is an equidigital number, since it uses as much as digits as its factorization.

30143021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30143021 is about 5490.2660226987. The cubic root of 30143021 is about 311.2162452172.

Adding to 30143021 its reverse (12034103), we get a palindrome (42177124).

The spelling of 30143021 in words is "thirty million, one hundred forty-three thousand, twenty-one".