213505043445 has 12 divisors (see below), whose sum is σ = 370075408716. Its totient is φ = 113869356480.

The previous prime is 213505043441. The next prime is 213505043459. The reversal of 213505043445 is 544340505312.

213505043445 is a `hidden beast` number, since 2 + 135 + 0 + 50 + 434 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127164273201 + 86340770244 = 356601^2 + 293838^2 .

It is not a de Polignac number, because 213505043445 - 2² = 213505043441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213505043441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2372278216 + ... + 2372278305.

It is an arithmetic number, because the mean of its divisors is an integer number (30839617393).

Almost surely, 2^213505043445 is an apocalyptic number.

It is an amenable number.

213505043445 is a deficient number, since it is larger than the sum of its proper divisors (156570365271).

213505043445 is a wasteful number, since it uses less digits than its factorization.

213505043445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744556532 (or 4744556529 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 213505043445 its reverse (544340505312), we get a palindrome (757845548757).

The spelling of 213505043445 in words is "two hundred thirteen billion, five hundred five million, forty-three thousand, four hundred forty-five".