211530230 has 16 divisors (see below), whose sum is σ = 400794480. Its totient is φ = 80158752.

The previous prime is 211530227. The next prime is 211530247. The reversal of 211530230 is 32035112.

It is a junction number, because it is equal to n+sod(n) for n = 211530199 and 211530208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556469 + ... + 556848.

It is an arithmetic number, because the mean of its divisors is an integer number (25049655).

Almost surely, 2^211530230 is an apocalyptic number.

211530230 is a deficient number, since it is larger than the sum of its proper divisors (189264250).

211530230 is a wasteful number, since it uses less digits than its factorization.

211530230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113343.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 211530230 is about 14544.0788639226. The cubic root of 211530230 is about 595.8324435520.

Adding to 211530230 its reverse (32035112), we get a palindrome (243565342).

The spelling of 211530230 in words is "two hundred eleven million, five hundred thirty thousand, two hundred thirty".