211974134 has 4 divisors (see below), whose sum is σ = 317961204. Its totient is φ = 105987066.

The previous prime is 211974097. The next prime is 211974151. The reversal of 211974134 is 431479112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211974134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52993532 + ... + 52993535.

It is an arithmetic number, because the mean of its divisors is an integer number (79490301).

Almost surely, 2^211974134 is an apocalyptic number.

211974134 is a deficient number, since it is larger than the sum of its proper divisors (105987070).

211974134 is a wasteful number, since it uses less digits than its factorization.

211974134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105987069.

The product of its digits is 6048, while the sum is 32.

The square root of 211974134 is about 14559.3315093791. The cubic root of 211974134 is about 596.2489444697.

The spelling of 211974134 in words is "two hundred eleven million, nine hundred seventy-four thousand, one hundred thirty-four".