213005543445 has 24 divisors (see below), whose sum is σ = 370523543832. Its totient is φ = 113198668800.

The previous prime is 213005543441. The next prime is 213005543479. The reversal of 213005543445 is 544345500312.

213005543445 is a `hidden beast` number, since 2 + 1 + 30 + 0 + 554 + 34 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3367016676 + 209638526769 = 58026^2 + 457863^2 .

It is not a de Polignac number, because 213005543445 - 2² = 213005543441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213005543441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8409876 + ... + 8435165.

It is an arithmetic number, because the mean of its divisors is an integer number (15438480993).

Almost surely, 2^213005543445 is an apocalyptic number.

It is an amenable number.

213005543445 is a deficient number, since it is larger than the sum of its proper divisors (157518000387).

213005543445 is a wasteful number, since it uses less digits than its factorization.

213005543445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16845333 (or 16845330 counting only the distinct ones).

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

The spelling of 213005543445 in words is "two hundred thirteen billion, five million, five hundred forty-three thousand, four hundred forty-five".