543216905 has 32 divisors (see below), whose sum is σ = 824878080. Its totient is φ = 333558720.

The previous prime is 543216887. The next prime is 543216907. The reversal of 543216905 is 509612345.

It is not a de Polignac number, because 543216905 - 2⁶ = 543216841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (543216907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15266 + ... + 36324.

It is an arithmetic number, because the mean of its divisors is an integer number (25777440).

Almost surely, 2^543216905 is an apocalyptic number.

543216905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

543216905 is a deficient number, since it is larger than the sum of its proper divisors (281661175).

543216905 is a wasteful number, since it uses less digits than its factorization.

543216905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21149.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 543216905 is about 23307.0140730210. The cubic root of 543216905 is about 815.9391259415.

The spelling of 543216905 in words is "five hundred forty-three million, two hundred sixteen thousand, nine hundred five".