211330013 has 2 divisors, whose sum is σ = 211330014. Its totient is φ = 211330012.

The previous prime is 211329991. The next prime is 211330019. The reversal of 211330013 is 310033112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141657604 + 69672409 = 11902^2 + 8347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211330013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211330013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211330019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665006 + 105665007.

It is an arithmetic number, because the mean of its divisors is an integer number (105665007).

Almost surely, 2^211330013 is an apocalyptic number.

It is an amenable number.

211330013 is a deficient number, since it is larger than the sum of its proper divisors (1).

211330013 is an equidigital number, since it uses as much as digits as its factorization.

211330013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 211330013 is about 14537.1941240392. The cubic root of 211330013 is about 595.6443956582.

Adding to 211330013 its reverse (310033112), we get a palindrome (521363125).

The spelling of 211330013 in words is "two hundred eleven million, three hundred thirty thousand, thirteen".