211445205 has 16 divisors (see below), whose sum is σ = 356118720. Its totient is φ = 106835328.

The previous prime is 211445197. The next prime is 211445207. The reversal of 211445205 is 502544112.

It is not a de Polignac number, because 211445205 - 2³ = 211445197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211445207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370672 + ... + 371241.

It is an arithmetic number, because the mean of its divisors is an integer number (22257420).

Almost surely, 2^211445205 is an apocalyptic number.

It is an amenable number.

211445205 is a deficient number, since it is larger than the sum of its proper divisors (144673515).

211445205 is a wasteful number, since it uses less digits than its factorization.

211445205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741940.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 211445205 is about 14541.1555593082. The cubic root of 211445205 is about 595.7526008384.

Adding to 211445205 its reverse (502544112), we get a palindrome (713989317).

The spelling of 211445205 in words is "two hundred eleven million, four hundred forty-five thousand, two hundred five".