211883764 has 12 divisors (see below), whose sum is σ = 370915300. Its totient is φ = 105907968.

The previous prime is 211883761. The next prime is 211883779. The reversal of 211883764 is 467388112.

It can be written as a sum of positive squares in 2 ways, for example, as 142993764 + 68890000 = 11958^2 + 8300^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211883761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10102 + ... + 22930.

Almost surely, 2^211883764 is an apocalyptic number.

It is an amenable number.

211883764 is a deficient number, since it is larger than the sum of its proper divisors (159031536).

211883764 is a wasteful number, since it uses less digits than its factorization.

211883764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16962 (or 16960 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 211883764 is about 14556.2276706570. The cubic root of 211883764 is about 596.1642003625.

The spelling of 211883764 in words is "two hundred eleven million, eight hundred eighty-three thousand, seven hundred sixty-four".