216403104 has 48 divisors (see below), whose sum is σ = 587653920. Its totient is φ = 69646080.

The previous prime is 216403097. The next prime is 216403139. The reversal of 216403104 is 401304612.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36082 + ... + 41649.

It is an arithmetic number, because the mean of its divisors is an integer number (12242790).

Almost surely, 2^216403104 is an apocalyptic number.

216403104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216403104 is an abundant number, since it is smaller than the sum of its proper divisors (371250816).

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

216403104 is a wasteful number, since it uses less digits than its factorization.

216403104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77773 (or 77765 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 216403104 is about 14710.6459409504. The cubic root of 216403104 is about 600.3730124992.

Adding to 216403104 its reverse (401304612), we get a palindrome (617707716).

The spelling of 216403104 in words is "two hundred sixteen million, four hundred three thousand, one hundred four".