212452346565 has 24 divisors (see below), whose sum is σ = 380949037560. Its totient is φ = 109400747904.

The previous prime is 212452346453. The next prime is 212452346597. The reversal of 212452346565 is 565643254212.

212452346565 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 52 + 34 + 6 + 565 = 666.

212452346565 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 209699361 + 212242647204 = 14481^2 + 460698^2 .

It is not a de Polignac number, because 212452346565 - 2¹⁵ = 212452313797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212452346565.

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 23 ways as a sum of consecutive naturals, for example, 81398062 + ... + 81400671.

It is an arithmetic number, because the mean of its divisors is an integer number (15872876565).

Almost surely, 2^212452346565 is an apocalyptic number.

It is an amenable number.

212452346565 is a deficient number, since it is larger than the sum of its proper divisors (168496690995).

212452346565 is a wasteful number, since it uses less digits than its factorization.

212452346565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162798773 (or 162798770 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 212452346565 in words is "two hundred twelve billion, four hundred fifty-two million, three hundred forty-six thousand, five hundred sixty-five".