211223404 has 24 divisors (see below), whose sum is σ = 425146400. Its totient is φ = 89945856.

The previous prime is 211223393. The next prime is 211223413. The reversal of 211223404 is 404322112.

It is a super-3 number, since 3×211223404³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19629 + ... + 28420.

Almost surely, 2^211223404 is an apocalyptic number.

It is an amenable number.

211223404 is an abundant number, since it is smaller than the sum of its proper divisors (213922996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223404 is a wasteful number, since it uses less digits than its factorization.

211223404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48217 (or 48215 counting only the distinct ones).

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

The square root of 211223404 is about 14533.5268947355. The cubic root of 211223404 is about 595.5442178470.

Adding to 211223404 its reverse (404322112), we get a palindrome (615545516).

The spelling of 211223404 in words is "two hundred eleven million, two hundred twenty-three thousand, four hundred four".