216612543 has 32 divisors (see below), whose sum is σ = 341372416. Its totient is φ = 119605248.

The previous prime is 216612533. The next prime is 216612563. The reversal of 216612543 is 345216612.

It is not a de Polignac number, because 216612543 - 2⁵ = 216612511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216612543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216612533) 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 31 ways as a sum of consecutive naturals, for example, 86355 + ... + 88827.

It is an arithmetic number, because the mean of its divisors is an integer number (10667888).

Almost surely, 2^216612543 is an apocalyptic number.

216612543 is a deficient number, since it is larger than the sum of its proper divisors (124759873).

216612543 is a wasteful number, since it uses less digits than its factorization.

216612543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623.

The product of its digits is 8640, while the sum is 30.

The square root of 216612543 is about 14717.7628395079. The cubic root of 216612543 is about 600.5666341522.

The spelling of 216612543 in words is "two hundred sixteen million, six hundred twelve thousand, five hundred forty-three".