211730541 has 16 divisors (see below), whose sum is σ = 308221248. Its totient is φ = 128217600.

The previous prime is 211730503. The next prime is 211730551. The reversal of 211730541 is 145037112.

211730541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211730541 - 2¹⁰ = 211729517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211730501) 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, 64971 + ... + 68151.

It is an arithmetic number, because the mean of its divisors is an integer number (19263828).

Almost surely, 2^211730541 is an apocalyptic number.

It is an amenable number.

211730541 is a deficient number, since it is larger than the sum of its proper divisors (96490707).

211730541 is a wasteful number, since it uses less digits than its factorization.

211730541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5212.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 211730541 is about 14550.9635763409. The cubic root of 211730541 is about 596.0204610260.

Adding to 211730541 its reverse (145037112), we get a palindrome (356767653).

The spelling of 211730541 in words is "two hundred eleven million, seven hundred thirty thousand, five hundred forty-one".