211344645 has 16 divisors (see below), whose sum is σ = 338332032. Its totient is φ = 112656960.

The previous prime is 211344641. The next prime is 211344647. The reversal of 211344645 is 546443112.

It is not a de Polignac number, because 211344645 - 2² = 211344641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211344641) 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 15 ways as a sum of consecutive naturals, for example, 50659 + ... + 54671.

It is an arithmetic number, because the mean of its divisors is an integer number (21145752).

Almost surely, 2^211344645 is an apocalyptic number.

It is an amenable number.

211344645 is a deficient number, since it is larger than the sum of its proper divisors (126987387).

211344645 is a wasteful number, since it uses less digits than its factorization.

211344645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7532.

The product of its digits is 11520, while the sum is 30.

The square root of 211344645 is about 14537.6973761322. The cubic root of 211344645 is about 595.6581423532.

Adding to 211344645 its reverse (546443112), we get a palindrome (757787757).

The spelling of 211344645 in words is "two hundred eleven million, three hundred forty-four thousand, six hundred forty-five".