305134211 has 2 divisors, whose sum is σ = 305134212. Its totient is φ = 305134210.

The previous prime is 305134189. The next prime is 305134213. The reversal of 305134211 is 112431503.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305134211 is a prime.

Together with 305134213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (305134213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152567105 + 152567106.

It is an arithmetic number, because the mean of its divisors is an integer number (152567106).

Almost surely, 2^305134211 is an apocalyptic number.

305134211 is a deficient number, since it is larger than the sum of its proper divisors (1).

305134211 is an equidigital number, since it uses as much as digits as its factorization.

305134211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 305134211 is about 17468.0912237142. The cubic root of 305134211 is about 673.2302693008.

Adding to 305134211 its reverse (112431503), we get a palindrome (417565714).

The spelling of 305134211 in words is "three hundred five million, one hundred thirty-four thousand, two hundred eleven".