216481704 has 32 divisors (see below), whose sum is σ = 564736320. Its totient is φ = 69022976.

The previous prime is 216481693. The next prime is 216481751. The reversal of 216481704 is 407184612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195537 + ... + 196640.

It is an arithmetic number, because the mean of its divisors is an integer number (17648010).

Almost surely, 2^216481704 is an apocalyptic number.

216481704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216481704 is an abundant number, since it is smaller than the sum of its proper divisors (348254616).

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

216481704 is a wasteful number, since it uses less digits than its factorization.

216481704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392209 (or 392205 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 216481704 is about 14713.3172330376. The cubic root of 216481704 is about 600.4456910727.

The spelling of 216481704 in words is "two hundred sixteen million, four hundred eighty-one thousand, seven hundred four".