30821041 has 2 divisors, whose sum is σ = 30821042. Its totient is φ = 30821040.

The previous prime is 30821039. The next prime is 30821047. The reversal of 30821041 is 14012803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16982641 + 13838400 = 4121^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 30821041 - 2¹ = 30821039 is a prime.

Together with 30821039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30821047) 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, 15410520 + 15410521.

It is an arithmetic number, because the mean of its divisors is an integer number (15410521).

Almost surely, 2^30821041 is an apocalyptic number.

It is an amenable number.

30821041 is a deficient number, since it is larger than the sum of its proper divisors (1).

30821041 is an equidigital number, since it uses as much as digits as its factorization.

30821041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 30821041 is about 5551.6701090753. The cubic root of 30821041 is about 313.5324054355.

Adding to 30821041 its reverse (14012803), we get a palindrome (44833844).

The spelling of 30821041 in words is "thirty million, eight hundred twenty-one thousand, forty-one".