211443404 has 12 divisors (see below), whose sum is σ = 371501928. Its totient is φ = 105300000.

The previous prime is 211443403. The next prime is 211443431. The reversal of 211443404 is 404344112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211443404.

It is not an unprimeable number, because it can be changed into a prime (211443403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104297 + ... + 106304.

It is an arithmetic number, because the mean of its divisors is an integer number (30958494).

Almost surely, 2^211443404 is an apocalyptic number.

It is an amenable number.

211443404 is a deficient number, since it is larger than the sum of its proper divisors (160058524).

211443404 is a wasteful number, since it uses less digits than its factorization.

211443404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210856 (or 210854 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 211443404 is about 14541.0936314983. The cubic root of 211443404 is about 595.7509093781.

Adding to 211443404 its reverse (404344112), we get a palindrome (615787516).

The spelling of 211443404 in words is "two hundred eleven million, four hundred forty-three thousand, four hundred four".