211322205 has 12 divisors (see below), whose sum is σ = 366291900. Its totient is φ = 112705152.

The previous prime is 211322203. The next prime is 211322219. The reversal of 211322205 is 502223112.

It can be written as a sum of positive squares in 2 ways, for example, as 33419961 + 177902244 = 5781^2 + 13338^2 .

It is not a de Polignac number, because 211322205 - 2¹ = 211322203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211322201) 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 in 11 ways as a sum of consecutive naturals, for example, 2347980 + ... + 2348069.

It is an arithmetic number, because the mean of its divisors is an integer number (30524325).

Almost surely, 2^211322205 is an apocalyptic number.

It is an amenable number.

211322205 is a deficient number, since it is larger than the sum of its proper divisors (154969695).

211322205 is a wasteful number, since it uses less digits than its factorization.

211322205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696060 (or 4696057 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 211322205 is about 14536.9255690466. The cubic root of 211322205 is about 595.6370598195.

Adding to 211322205 its reverse (502223112), we get a palindrome (713545317).

The spelling of 211322205 in words is "two hundred eleven million, three hundred twenty-two thousand, two hundred five".