216031233 has 16 divisors (see below), whose sum is σ = 320158656. Its totient is φ = 128456640.

The previous prime is 216031217. The next prime is 216031241. The reversal of 216031233 is 332130612.

It is not a de Polignac number, because 216031233 - 2⁴ = 216031217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216031243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60010 + ... + 63507.

It is an arithmetic number, because the mean of its divisors is an integer number (20009916).

Almost surely, 2^216031233 is an apocalyptic number.

It is an amenable number.

216031233 is a deficient number, since it is larger than the sum of its proper divisors (104127423).

216031233 is a wasteful number, since it uses less digits than its factorization.

216031233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123584.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 216031233 is about 14698.0009865287. Note that the first 3 decimals coincide. The cubic root of 216031233 is about 600.0289180507.

Adding to 216031233 its reverse (332130612), we get a palindrome (548161845).

The spelling of 216031233 in words is "two hundred sixteen million, thirty-one thousand, two hundred thirty-three".