211304404 has 12 divisors (see below), whose sum is σ = 385860384. Its totient is φ = 101058584.

The previous prime is 211304383. The next prime is 211304419. The reversal of 211304404 is 404403112.

It is a super-2 number, since 2×211304404² = 89299102299590432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148302 + ... + 1148485.

It is an arithmetic number, because the mean of its divisors is an integer number (32155032).

Almost surely, 2^211304404 is an apocalyptic number.

It is an amenable number.

211304404 is a deficient number, since it is larger than the sum of its proper divisors (174555980).

211304404 is a wasteful number, since it uses less digits than its factorization.

211304404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296814 (or 2296812 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 211304404 is about 14536.3132877632. The cubic root of 211304404 is about 595.6203345964.

Adding to 211304404 its reverse (404403112), we get a palindrome (615707516).

The spelling of 211304404 in words is "two hundred eleven million, three hundred four thousand, four hundred four".