4000218212 has 12 divisors (see below), whose sum is σ = 7025296236. Its totient is φ = 1992990720.

The previous prime is 4000218169. The next prime is 4000218253. The reversal of 4000218212 is 2128120004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1326707776 + 2673510436 = 36424^2 + 51706^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778333 + ... + 1780580.

It is an arithmetic number, because the mean of its divisors is an integer number (585441353).

Almost surely, 2^4000218212 is an apocalyptic number.

It is an amenable number.

4000218212 is a deficient number, since it is larger than the sum of its proper divisors (3025078024).

4000218212 is a wasteful number, since it uses less digits than its factorization.

4000218212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559198 (or 3559196 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 4000218212 is about 63247.2782971726. The cubic root of 4000218212 is about 1587.4299172732.

Adding to 4000218212 its reverse (2128120004), we get a palindrome (6128338216).

The spelling of 4000218212 in words is "four billion, two hundred eighteen thousand, two hundred twelve".