211375138 has 16 divisors (see below), whose sum is σ = 341732160. Its totient is φ = 97477776.

The previous prime is 211375103. The next prime is 211375141. The reversal of 211375138 is 831573112.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39253 + ... + 44311.

It is an arithmetic number, because the mean of its divisors is an integer number (21358260).

Almost surely, 2^211375138 is an apocalyptic number.

211375138 is a deficient number, since it is larger than the sum of its proper divisors (130357022).

211375138 is a wasteful number, since it uses less digits than its factorization.

211375138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681.

The product of its digits is 5040, while the sum is 31.

The square root of 211375138 is about 14538.7460944883. The cubic root of 211375138 is about 595.6867883440.

The spelling of 211375138 in words is "two hundred eleven million, three hundred seventy-five thousand, one hundred thirty-eight".