215343355343 has 4 divisors (see below), whose sum is σ = 215364356280. Its totient is φ = 215322354408.

The previous prime is 215343355309. The next prime is 215343355351. The reversal of 215343355343 is 343553343512.

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 215343355343 - 2²⁴ = 215326578127 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 215343355343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215343355373) 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, 10485080 + ... + 10505597.

It is an arithmetic number, because the mean of its divisors is an integer number (53841089070).

Almost surely, 2^215343355343 is an apocalyptic number.

215343355343 is a deficient number, since it is larger than the sum of its proper divisors (21000937).

215343355343 is a wasteful number, since it uses less digits than its factorization.

215343355343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000936.

The product of its digits is 972000, while the sum is 41.

Adding to 215343355343 its reverse (343553343512), we get a palindrome (558896698855).

The spelling of 215343355343 in words is "two hundred fifteen billion, three hundred forty-three million, three hundred fifty-five thousand, three hundred forty-three".