211138208 has 12 divisors (see below), whose sum is σ = 415678410. Its totient is φ = 105569088.

The previous prime is 211138201. The next prime is 211138231. The reversal of 211138208 is 802831112.

It can be written as a sum of positive squares in only one way, i.e., 120736144 + 90402064 = 10988^2 + 9508^2 .

It is not an unprimeable number, because it can be changed into a prime (211138201) 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, 3299003 + ... + 3299066.

Almost surely, 2^211138208 is an apocalyptic number.

It is an amenable number.

211138208 is a deficient number, since it is larger than the sum of its proper divisors (204540202).

211138208 is an equidigital number, since it uses as much as digits as its factorization.

211138208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598079 (or 6598071 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 211138208 is about 14530.5955831136. The cubic root of 211138208 is about 595.4641370615.

The spelling of 211138208 in words is "two hundred eleven million, one hundred thirty-eight thousand, two hundred eight".