212817820535 has 8 divisors (see below), whose sum is σ = 263619494016. Its totient is φ = 164762183520.

The previous prime is 212817820529. The next prime is 212817820609. The reversal of 212817820535 is 535028718212.

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

It is not a de Polignac number, because 212817820535 - 2³⁴ = 195637951351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686508944 + ... + 686509253.

It is an arithmetic number, because the mean of its divisors is an integer number (32952436752).

Almost surely, 2^212817820535 is an apocalyptic number.

212817820535 is a deficient number, since it is larger than the sum of its proper divisors (50801673481).

212817820535 is a wasteful number, since it uses less digits than its factorization.

212817820535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373018233.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 212817820535 in words is "two hundred twelve billion, eight hundred seventeen million, eight hundred twenty thousand, five hundred thirty-five".