212564315543 has 4 divisors (see below), whose sum is σ = 212937891360. Its totient is φ = 212190739728.

The previous prime is 212564315521. The next prime is 212564315563. The reversal of 212564315543 is 345513465212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212564315543 - 2⁶ = 212564315479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212564315543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212564315563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186787055 + ... + 186788192.

It is an arithmetic number, because the mean of its divisors is an integer number (53234472840).

Almost surely, 2^212564315543 is an apocalyptic number.

212564315543 is a deficient number, since it is larger than the sum of its proper divisors (373575817).

212564315543 is an equidigital number, since it uses as much as digits as its factorization.

212564315543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373575816.

The product of its digits is 432000, while the sum is 41.

The spelling of 212564315543 in words is "two hundred twelve billion, five hundred sixty-four million, three hundred fifteen thousand, five hundred forty-three".