216020403 has 12 divisors (see below), whose sum is σ = 313098240. Its totient is φ = 143520336.

The previous prime is 216020401. The next prime is 216020407. The reversal of 216020403 is 304020612.

It is a happy number.

216020403 is a `hidden beast` number, since 21 + 602 + 0 + 40 + 3 = 666.

216020403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216020403 - 2¹ = 216020401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216020401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38323 + ... + 43596.

It is an arithmetic number, because the mean of its divisors is an integer number (26091520).

Almost surely, 2^216020403 is an apocalyptic number.

216020403 is a deficient number, since it is larger than the sum of its proper divisors (97077837).

216020403 is a wasteful number, since it uses less digits than its factorization.

216020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82218 (or 82215 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 216020403 is about 14697.6325644643. The cubic root of 216020403 is about 600.0188910719.

The spelling of 216020403 in words is "two hundred sixteen million, twenty thousand, four hundred three".