216503433 has 6 divisors (see below), whose sum is σ = 312727194. Its totient is φ = 144335616.

The previous prime is 216503387. The next prime is 216503437. The reversal of 216503433 is 334305612.

It is a happy number.

216503433 is a `hidden beast` number, since 2 + 1 + 650 + 3 + 4 + 3 + 3 = 666.

216503433 is digitally balanced in base 2, 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., 200845584 + 15657849 = 14172^2 + 3957^2 .

It is not a de Polignac number, because 216503433 - 2⁶ = 216503369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216503397 and 216503406.

It is not an unprimeable number, because it can be changed into a prime (216503437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12027960 + ... + 12027977.

It is an arithmetic number, because the mean of its divisors is an integer number (52121199).

Almost surely, 2^216503433 is an apocalyptic number.

It is an amenable number.

216503433 is a deficient number, since it is larger than the sum of its proper divisors (96223761).

216503433 is a wasteful number, since it uses less digits than its factorization.

216503433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24055943 (or 24055940 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 216503433 is about 14714.0556271886. The cubic root of 216503433 is about 600.4657799881.

The spelling of 216503433 in words is "two hundred sixteen million, five hundred three thousand, four hundred thirty-three".