216042633 has 10 divisors (see below), whose sum is σ = 322730474. Its totient is φ = 144028368.

The previous prime is 216042581. The next prime is 216042649. The reversal of 216042633 is 336240612.

216042633 is a `hidden beast` number, since 2 + 1 + 604 + 26 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 184199184 + 31843449 = 13572^2 + 5643^2 .

It is not a de Polignac number, because 216042633 - 2⁶ = 216042569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216042597 and 216042606.

It is not an unprimeable number, because it can be changed into a prime (216041633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1333516 + ... + 1333677.

Almost surely, 2^216042633 is an apocalyptic number.

It is an amenable number.

216042633 is a deficient number, since it is larger than the sum of its proper divisors (106687841).

216042633 is an equidigital number, since it uses as much as digits as its factorization.

216042633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667205 (or 2667196 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 216042633 is about 14698.3887892517. The cubic root of 216042633 is about 600.0394724032.

The spelling of 216042633 in words is "two hundred sixteen million, forty-two thousand, six hundred thirty-three".