216382406 has 4 divisors (see below), whose sum is σ = 324573612. Its totient is φ = 108191202.

The previous prime is 216382403. The next prime is 216382447. The reversal of 216382406 is 604283612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216382403) by changing a digit.

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 as a sum of consecutive naturals, namely, 54095600 + ... + 54095603.

It is an arithmetic number, because the mean of its divisors is an integer number (81143403).

Almost surely, 2^216382406 is an apocalyptic number.

216382406 is a deficient number, since it is larger than the sum of its proper divisors (108191206).

216382406 is a wasteful number, since it uses less digits than its factorization.

216382406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108191205.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 216382406 is about 14709.9424200097. The cubic root of 216382406 is about 600.3538708809.

The spelling of 216382406 in words is "two hundred sixteen million, three hundred eighty-two thousand, four hundred six".