216931133 has 8 divisors (see below), whose sum is σ = 219512160. Its totient is φ = 214358800.

The previous prime is 216931097. The next prime is 216931177. The reversal of 216931133 is 331139612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216931133 - 2⁶ = 216931069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216931096 and 216931105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216931933) 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 in 7 ways as a sum of consecutive naturals, for example, 57458 + ... + 61116.

It is an arithmetic number, because the mean of its divisors is an integer number (27439020).

Almost surely, 2^216931133 is an apocalyptic number.

It is an amenable number.

216931133 is a deficient number, since it is larger than the sum of its proper divisors (2581027).

216931133 is a wasteful number, since it uses less digits than its factorization.

216931133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347.

The product of its digits is 2916, while the sum is 29.

The square root of 216931133 is about 14728.5821788793. The cubic root of 216931133 is about 600.8609242767.

The spelling of 216931133 in words is "two hundred sixteen million, nine hundred thirty-one thousand, one hundred thirty-three".