216343347 has 16 divisors (see below), whose sum is σ = 322358400. Its totient is φ = 127918400.

The previous prime is 216343333. The next prime is 216343349. The reversal of 216343347 is 743343612.

216343347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 216343347 - 2¹⁴ = 216326963 is a prime.

It is a super-3 number, since 3×216343347³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (216343349) 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, 78597 + ... + 81302.

It is an arithmetic number, because the mean of its divisors is an integer number (20147400).

Almost surely, 2^216343347 is an apocalyptic number.

216343347 is a deficient number, since it is larger than the sum of its proper divisors (106015053).

216343347 is a wasteful number, since it uses less digits than its factorization.

216343347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159954.

The product of its digits is 36288, while the sum is 33.

The square root of 216343347 is about 14708.6147206323. The cubic root of 216343347 is about 600.3177455888.

Adding to 216343347 its reverse (743343612), we get a palindrome (959686959).

The spelling of 216343347 in words is "two hundred sixteen million, three hundred forty-three thousand, three hundred forty-seven".