211440230 has 16 divisors (see below), whose sum is σ = 381659040. Its totient is φ = 84339072.

The previous prime is 211440209. The next prime is 211440241. The reversal of 211440230 is 32044112.

It is a junction number, because it is equal to n+sod(n) for n = 211440199 and 211440208.

It is a congruent number.

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, 25859 + ... + 33038.

It is an arithmetic number, because the mean of its divisors is an integer number (23853690).

Almost surely, 2^211440230 is an apocalyptic number.

211440230 is a deficient number, since it is larger than the sum of its proper divisors (170218810).

211440230 is a wasteful number, since it uses less digits than its factorization.

211440230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59263.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211440230 is about 14540.9844921174. The cubic root of 211440230 is about 595.7479284026.

Adding to 211440230 its reverse (32044112), we get a palindrome (243484342).

The spelling of 211440230 in words is "two hundred eleven million, four hundred forty thousand, two hundred thirty".