212345205455 has 8 divisors (see below), whose sum is σ = 268225522800. Its totient is φ = 160935313536.

The previous prime is 212345205407. The next prime is 212345205491. The reversal of 212345205455 is 554502543212.

212345205455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212345205455 - 2³⁰ = 211271463631 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1117606250 + ... + 1117606439.

It is an arithmetic number, because the mean of its divisors is an integer number (33528190350).

Almost surely, 2^212345205455 is an apocalyptic number.

212345205455 is a deficient number, since it is larger than the sum of its proper divisors (55880317345).

212345205455 is a wasteful number, since it uses less digits than its factorization.

212345205455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235212713.

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 212345205455 its reverse (554502543212), we get a palindrome (766847748667).

The spelling of 212345205455 in words is "two hundred twelve billion, three hundred forty-five million, two hundred five thousand, four hundred fifty-five".