211305412 has 12 divisors (see below), whose sum is σ = 369942160. Its totient is φ = 105607656.

The previous prime is 211305389. The next prime is 211305421. The reversal of 211305412 is 214503112.

It is a self number, because there is not a number n which added to its sum of digits gives 211305412.

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 3 ways as a sum of consecutive naturals, for example, 703 + ... + 20569.

Almost surely, 2^211305412 is an apocalyptic number.

It is an amenable number.

211305412 is a deficient number, since it is larger than the sum of its proper divisors (158636748).

211305412 is a wasteful number, since it uses less digits than its factorization.

211305412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22530 (or 22528 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 211305412 is about 14536.3479595117. The cubic root of 211305412 is about 595.6212817045.

Adding to 211305412 its reverse (214503112), we get a palindrome (425808524).

The spelling of 211305412 in words is "two hundred eleven million, three hundred five thousand, four hundred twelve".