211493938 has 4 divisors (see below), whose sum is σ = 317240910. Its totient is φ = 105746968.

The previous prime is 211493879. The next prime is 211493939. The reversal of 211493938 is 839394112.

211493938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207561649 + 3932289 = 14407^2 + 1983^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211493938.

It is not an unprimeable number, because it can be changed into a prime (211493939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52873483 + ... + 52873486.

Almost surely, 2^211493938 is an apocalyptic number.

211493938 is a deficient number, since it is larger than the sum of its proper divisors (105746972).

211493938 is a wasteful number, since it uses less digits than its factorization.

211493938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105746971.

The product of its digits is 46656, while the sum is 40.

The square root of 211493938 is about 14542.8311549024. The cubic root of 211493938 is about 595.7983661724.

The spelling of 211493938 in words is "two hundred eleven million, four hundred ninety-three thousand, nine hundred thirty-eight".