211135530 has 32 divisors (see below), whose sum is σ = 509845824. Its totient is φ = 55956096.

The previous prime is 211135511. The next prime is 211135541. The reversal of 211135530 is 35531112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211135497 and 211135506.

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 15 ways as a sum of consecutive naturals, for example, 16699 + ... + 26478.

It is an arithmetic number, because the mean of its divisors is an integer number (15932682).

Almost surely, 2^211135530 is an apocalyptic number.

211135530 is an abundant number, since it is smaller than the sum of its proper divisors (298710294).

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

211135530 is a wasteful number, since it uses less digits than its factorization.

211135530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43350.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 211135530 is about 14530.5034324348. The cubic root of 211135530 is about 595.4616195009.

Adding to 211135530 its reverse (35531112), we get a palindrome (246666642).

The spelling of 211135530 in words is "two hundred eleven million, one hundred thirty-five thousand, five hundred thirty".