30405211 has 2 divisors, whose sum is σ = 30405212. Its totient is φ = 30405210.

The previous prime is 30405169. The next prime is 30405239. The reversal of 30405211 is 11250403.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30405211 is a prime.

It is not a weakly prime, because it can be changed into another prime (30405281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15202605 + 15202606.

It is an arithmetic number, because the mean of its divisors is an integer number (15202606).

Almost surely, 2^30405211 is an apocalyptic number.

30405211 is a deficient number, since it is larger than the sum of its proper divisors (1).

30405211 is an equidigital number, since it uses as much as digits as its factorization.

30405211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 30405211 is about 5514.0920376795. The cubic root of 30405211 is about 312.1159818361.

Adding to 30405211 its reverse (11250403), we get a palindrome (41655614).

The spelling of 30405211 in words is "thirty million, four hundred five thousand, two hundred eleven".