212242647204 has 135 divisors (see below), whose sum is σ = 626281715787. Its totient is φ = 60602057712.

The previous prime is 212242647191. The next prime is 212242647233. The reversal of 212242647204 is 402746242212.

The square root of 212242647204 is 460698.

It is a perfect power (a square), and thus also a powerful number.

212242647204 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 4 + 2 + 647 + 2 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 135444429 + ... + 135445995.

Almost surely, 2^212242647204 is an apocalyptic number.

212242647204 is the 460698-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212242647204

212242647204 is an abundant number, since it is smaller than the sum of its proper divisors (414039068583).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212242647204 is an frugal number, since it uses more digits than its factorization.

212242647204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 36.

Multiplying 212242647204 by its sum of digits (36), we get a square (7640735299344 = 2764188²).

212242647204 divided by its sum of digits (36) gives a square (5895629089 = 76783²).

Adding to 212242647204 its reverse (402746242212), we get a palindrome (614988889416).

The spelling of 212242647204 in words is "two hundred twelve billion, two hundred forty-two million, six hundred forty-seven thousand, two hundred four".