211302306 has 24 divisors (see below), whose sum is σ = 481918320. Its totient is φ = 66726936.

The previous prime is 211302283. The next prime is 211302307. The reversal of 211302306 is 603203112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211302307) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 308580 + ... + 309263.

It is an arithmetic number, because the mean of its divisors is an integer number (20079930).

Almost surely, 2^211302306 is an apocalyptic number.

211302306 is an abundant number, since it is smaller than the sum of its proper divisors (270616014).

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

211302306 is a wasteful number, since it uses less digits than its factorization.

211302306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617870 (or 617867 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 211302306 is about 14536.2411234817. The cubic root of 211302306 is about 595.6183633241.

Adding to 211302306 its reverse (603203112), we get a palindrome (814505418).

It can be divided in two parts, 21130 and 2306, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 211302306 in words is "two hundred eleven million, three hundred two thousand, three hundred six".