211533133545 has 12 divisors (see below), whose sum is σ = 366657431556. Its totient is φ = 112817671200.

The previous prime is 211533133481. The next prime is 211533133573. The reversal of 211533133545 is 545331335112.

211533133545 is a `hidden beast` number, since 2 + 1 + 1 + 53 + 31 + 33 + 545 = 666.

211533133545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 160138429929 + 51394703616 = 400173^2 + 226704^2 .

It is not a de Polignac number, because 211533133545 - 2⁶ = 211533133481 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2350368106 + ... + 2350368195.

It is an arithmetic number, because the mean of its divisors is an integer number (30554785963).

Almost surely, 2^211533133545 is an apocalyptic number.

It is an amenable number.

211533133545 is a deficient number, since it is larger than the sum of its proper divisors (155124298011).

211533133545 is a wasteful number, since it uses less digits than its factorization.

211533133545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700736312 (or 4700736309 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

Adding to 211533133545 its reverse (545331335112), we get a palindrome (756864468657).

The spelling of 211533133545 in words is "two hundred eleven billion, five hundred thirty-three million, one hundred thirty-three thousand, five hundred forty-five".