212544404 has 24 divisors (see below), whose sum is σ = 394448040. Its totient is φ = 99864576.

The previous prime is 212544383. The next prime is 212544419. The reversal of 212544404 is 404445212.

212544404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 73068304 + 139476100 = 8548^2 + 11810^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49412 + ... + 53540.

It is an arithmetic number, because the mean of its divisors is an integer number (16435335).

Almost surely, 2^212544404 is an apocalyptic number.

It is an amenable number.

212544404 is a deficient number, since it is larger than the sum of its proper divisors (181903636).

212544404 is a wasteful number, since it uses less digits than its factorization.

212544404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907 (or 4905 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 212544404 is about 14578.9027021926. The cubic root of 212544404 is about 596.7831581102.

Adding to 212544404 its reverse (404445212), we get a palindrome (616989616).

The spelling of 212544404 in words is "two hundred twelve million, five hundred forty-four thousand, four hundred four".