212755321606 has 32 divisors (see below), whose sum is σ = 339775315488. Its totient is φ = 99567636480.

The previous prime is 212755321591. The next prime is 212755321613. The reversal of 212755321606 is 606123557212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4584901 + ... + 4631071.

It is an arithmetic number, because the mean of its divisors is an integer number (10617978609).

Almost surely, 2^212755321606 is an apocalyptic number.

212755321606 is a deficient number, since it is larger than the sum of its proper divisors (127019993882).

212755321606 is a wasteful number, since it uses less digits than its factorization.

212755321606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46936.

The product of its (nonzero) digits is 151200, while the sum is 40.

Adding to 212755321606 its reverse (606123557212), we get a palindrome (818878878818).

It can be divided in two parts, 212755 and 321606, that added together give a square (534361 = 731²).

The spelling of 212755321606 in words is "two hundred twelve billion, seven hundred fifty-five million, three hundred twenty-one thousand, six hundred six".