30312211 has 2 divisors, whose sum is σ = 30312212. Its totient is φ = 30312210.

The previous prime is 30312199. The next prime is 30312263. The reversal of 30312211 is 11221303.

It is a weak prime.

It is an emirp because it is prime and its reverse (11221303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30312211 - 2⁷ = 30312083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30312191 and 30312200.

It is not a weakly prime, because it can be changed into another prime (30312281) 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, 15156105 + 15156106.

It is an arithmetic number, because the mean of its divisors is an integer number (15156106).

Almost surely, 2^30312211 is an apocalyptic number.

30312211 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312211 is an equidigital number, since it uses as much as digits as its factorization.

30312211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 30312211 is about 5505.6526406957. The cubic root of 30312211 is about 311.7974352191.

Adding to 30312211 its reverse (11221303), we get a palindrome (41533514).

The spelling of 30312211 in words is "thirty million, three hundred twelve thousand, two hundred eleven".