216755943 has 16 divisors (see below), whose sum is σ = 291191040. Its totient is φ = 143417664.

The previous prime is 216755941. The next prime is 216755969. The reversal of 216755943 is 349557612.

It is not a de Polignac number, because 216755943 - 2¹ = 216755941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216755895 and 216755904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216755941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336780 + ... + 337422.

It is an arithmetic number, because the mean of its divisors is an integer number (18199440).

Almost surely, 2^216755943 is an apocalyptic number.

216755943 is a deficient number, since it is larger than the sum of its proper divisors (74435097).

216755943 is a wasteful number, since it uses less digits than its factorization.

216755943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318.

The product of its digits is 226800, while the sum is 42.

The square root of 216755943 is about 14722.6336978137. The cubic root of 216755943 is about 600.6991322626.

The spelling of 216755943 in words is "two hundred sixteen million, seven hundred fifty-five thousand, nine hundred forty-three".