216433 has 8 divisors (see below), whose sum is σ = 252800. Its totient is φ = 185220.

The previous prime is 216431. The next prime is 216451. The reversal of 216433 is 334612.

It is not a de Polignac number, because 216433 - 2¹ = 216431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216433.

It is not an unprimeable number, because it can be changed into a prime (216431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (31600).

2²¹⁶⁴³³ is an apocalyptic number.

It is an amenable number.

216433 is a deficient number, since it is larger than the sum of its proper divisors (36367).

216433 is an frugal number, since it uses more digits than its factorization.

216433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 638 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 216433 is about 465.2236021528. The cubic root of 216433 is about 60.0400658321.

It can be divided in two parts, 2164 and 33, that added together give a cube (2197 = 13³).

The spelling of 216433 in words is "two hundred sixteen thousand, four hundred thirty-three".