216387104 has 12 divisors (see below), whose sum is σ = 426012174. Its totient is φ = 108193536.

The previous prime is 216387089. The next prime is 216387109. The reversal of 216387104 is 401783612.

216387104 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 162511504 + 53875600 = 12748^2 + 7340^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 6762097 = 216387104 / (2 + 1 + 6 + 3 + 8 + 7 + 1 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (216387109) by changing a digit.

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 as a sum of consecutive naturals, namely, 3381017 + ... + 3381080.

Almost surely, 2^216387104 is an apocalyptic number.

It is an amenable number.

216387104 is a deficient number, since it is larger than the sum of its proper divisors (209625070).

216387104 is an equidigital number, since it uses as much as digits as its factorization.

216387104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762107 (or 6762099 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 216387104 is about 14710.1021070555. The cubic root of 216387104 is about 600.3582157229.

The spelling of 216387104 in words is "two hundred sixteen million, three hundred eighty-seven thousand, one hundred four".