216449233 has 16 divisors (see below), whose sum is σ = 290618496. Its totient is φ = 155687040.

The previous prime is 216449213. The next prime is 216449237. The reversal of 216449233 is 332944612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 216449233 - 2¹³ = 216441041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216449237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107116 + ... + 109117.

It is an arithmetic number, because the mean of its divisors is an integer number (18163656).

Almost surely, 2^216449233 is an apocalyptic number.

It is an amenable number.

216449233 is a deficient number, since it is larger than the sum of its proper divisors (74169263).

216449233 is a wasteful number, since it uses less digits than its factorization.

216449233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216264.

The product of its digits is 31104, while the sum is 34.

The square root of 216449233 is about 14712.2137355328. The cubic root of 216449233 is about 600.4156684479.

The spelling of 216449233 in words is "two hundred sixteen million, four hundred forty-nine thousand, two hundred thirty-three".