211775332138 has 8 divisors (see below), whose sum is σ = 318981102660. Its totient is φ = 105448297920.

The previous prime is 211775332133. The next prime is 211775332141. The reversal of 211775332138 is 831233577112.

It can be written as a sum of positive squares in 2 ways, for example, as 201831852049 + 9943480089 = 449257^2 + 99717^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 211775332094 and 211775332103.

It is not an unprimeable number, because it can be changed into a prime (211775332133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219683473 + ... + 219684436.

Almost surely, 2^211775332138 is an apocalyptic number.

211775332138 is a deficient number, since it is larger than the sum of its proper divisors (107205770522).

211775332138 is a wasteful number, since it uses less digits than its factorization.

211775332138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439368152.

The product of its digits is 211680, while the sum is 43.

The spelling of 211775332138 in words is "two hundred eleven billion, seven hundred seventy-five million, three hundred thirty-two thousand, one hundred thirty-eight".