212005443 has 16 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 130293024.

The previous prime is 212005433. The next prime is 212005463. The reversal of 212005443 is 344500212.

It is not a de Polignac number, because 212005443 - 2⁵ = 212005411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212005403) 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 15 ways as a sum of consecutive naturals, for example, 30508 + ... + 36806.

It is an arithmetic number, because the mean of its divisors is an integer number (19051200).

Almost surely, 2^212005443 is an apocalyptic number.

212005443 is a deficient number, since it is larger than the sum of its proper divisors (92813757).

212005443 is a wasteful number, since it uses less digits than its factorization.

212005443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7178.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 212005443 is about 14560.4066907487. The cubic root of 212005443 is about 596.2782987417.

Adding to 212005443 its reverse (344500212), we get a palindrome (556505655).

The spelling of 212005443 in words is "two hundred twelve million, five thousand, four hundred forty-three".