211538804389 has 8 divisors (see below), whose sum is σ = 230943523968. Its totient is φ = 192163071360.

The previous prime is 211538804387. The next prime is 211538804413. The reversal of 211538804389 is 983408835112.

It is a happy number.

211538804389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211538804389 - 2¹ = 211538804387 is a prime.

It is a super-3 number, since 3×211538804389³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211538804381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7231372 + ... + 7260565.

It is an arithmetic number, because the mean of its divisors is an integer number (28867940496).

Almost surely, 2^211538804389 is an apocalyptic number.

It is an amenable number.

211538804389 is a deficient number, since it is larger than the sum of its proper divisors (19404719579).

211538804389 is a wasteful number, since it uses less digits than its factorization.

211538804389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14493275.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 211538804389 in words is "two hundred eleven billion, five hundred thirty-eight million, eight hundred four thousand, three hundred eighty-nine".