216744343 has 16 divisors (see below), whose sum is σ = 237168640. Its totient is φ = 197316000.

The previous prime is 216744337. The next prime is 216744371. The reversal of 216744343 is 343447612.

It is a cyclic number.

It is not a de Polignac number, because 216744343 - 2²⁵ = 183189911 is a prime.

It is a super-2 number, since 2×216744343² = 93956220445003298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216744299 and 216744308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216744313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87721 + ... + 90157.

It is an arithmetic number, because the mean of its divisors is an integer number (14823040).

Almost surely, 2^216744343 is an apocalyptic number.

216744343 is a deficient number, since it is larger than the sum of its proper divisors (20424297).

216744343 is a wasteful number, since it uses less digits than its factorization.

216744343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638.

The product of its digits is 48384, while the sum is 34.

The square root of 216744343 is about 14722.2397412894. The cubic root of 216744343 is about 600.6884163177.

The spelling of 216744343 in words is "two hundred sixteen million, seven hundred forty-four thousand, three hundred forty-three".