212046644 has 12 divisors (see below), whose sum is σ = 392910084. Its totient is φ = 99786624.

The previous prime is 212046641. The next prime is 212046671. The reversal of 212046644 is 446640212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 192155044 + 19891600 = 13862^2 + 4460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212046641) 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, 1559099 + ... + 1559234.

It is an arithmetic number, because the mean of its divisors is an integer number (32742507).

Almost surely, 2^212046644 is an apocalyptic number.

It is an amenable number.

212046644 is a deficient number, since it is larger than the sum of its proper divisors (180863440).

212046644 is a wasteful number, since it uses less digits than its factorization.

212046644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118354 (or 3118352 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 212046644 is about 14561.8214520025. The cubic root of 212046644 is about 596.3169230188.

Adding to 212046644 its reverse (446640212), we get a palindrome (658686856).

The spelling of 212046644 in words is "two hundred twelve million, forty-six thousand, six hundred forty-four".