216543450 has 48 divisors (see below), whose sum is σ = 568624320. Its totient is φ = 54347520.

The previous prime is 216543449. The next prime is 216543461. The reversal of 216543450 is 54345612.

216543450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39910 + ... + 45009.

It is an arithmetic number, because the mean of its divisors is an integer number (11846340).

Almost surely, 2^216543450 is an apocalyptic number.

216543450 is an abundant number, since it is smaller than the sum of its proper divisors (352080870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216543450 is a wasteful number, since it uses less digits than its factorization.

216543450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84951 (or 84946 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 216543450 is about 14715.4153865937. The cubic root of 216543450 is about 600.5027730256.

The spelling of 216543450 in words is "two hundred sixteen million, five hundred forty-three thousand, four hundred fifty".