211806474 has 32 divisors (see below), whose sum is σ = 463644864. Its totient is φ = 63972480.

The previous prime is 211806473. The next prime is 211806481. The reversal of 211806474 is 474608112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (211806473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15532 + ... + 25784.

It is an arithmetic number, because the mean of its divisors is an integer number (14488902).

Almost surely, 2^211806474 is an apocalyptic number.

211806474 is an abundant number, since it is smaller than the sum of its proper divisors (251838390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211806474 is a wasteful number, since it uses less digits than its factorization.

211806474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10582.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 211806474 is about 14553.5725510955. The cubic root of 211806474 is about 596.0917028542.

The spelling of 211806474 in words is "two hundred eleven million, eight hundred six thousand, four hundred seventy-four".