211422404 has 24 divisors (see below), whose sum is σ = 401313528. Its totient is φ = 97064960.

The previous prime is 211422397. The next prime is 211422413. The reversal of 211422404 is 404224112.

It can be written as a sum of positive squares in 4 ways, for example, as 47582404 + 163840000 = 6898^2 + 12800^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35129 + ... + 40704.

It is an arithmetic number, because the mean of its divisors is an integer number (16721397).

Almost surely, 2^211422404 is an apocalyptic number.

It is an amenable number.

211422404 is a deficient number, since it is larger than the sum of its proper divisors (189891124).

211422404 is a wasteful number, since it uses less digits than its factorization.

211422404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75895 (or 75893 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 211422404 is about 14540.3715220760. The cubic root of 211422404 is about 595.7311859233.

Adding to 211422404 its reverse (404224112), we get a palindrome (615646516).

The spelling of 211422404 in words is "two hundred eleven million, four hundred twenty-two thousand, four hundred four".