211305530 has 16 divisors (see below), whose sum is σ = 384044544. Its totient is φ = 83701200.

The previous prime is 211305527. The next prime is 211305551. The reversal of 211305530 is 35503112.

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, 101546 + ... + 103605.

It is an arithmetic number, because the mean of its divisors is an integer number (24002784).

Almost surely, 2^211305530 is an apocalyptic number.

211305530 is a deficient number, since it is larger than the sum of its proper divisors (172739014).

211305530 is a wasteful number, since it uses less digits than its factorization.

211305530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205261.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 211305530 is about 14536.3520183023. The cubic root of 211305530 is about 595.6213925761.

Adding to 211305530 its reverse (35503112), we get a palindrome (246808642).

The spelling of 211305530 in words is "two hundred eleven million, three hundred five thousand, five hundred thirty".